I stood frozen at the lounge door in shock. I had arranged to inspect the renovation of the apartment when my tenant Zach said he would be at work. But that chat was a couple of weeks ago, and here he was on the sofa.

He hadn't seen me. He had airpods in his ears which explained why he had not heard me coming in. His eyes were closed. His trousers and underpants were pushed down to his ankles, and his T-shirt pulled up, uncovering a smooth flat belly where one hand was gently squeezing a nipple. A finger on his other hand was lightly running up and down the underside of his fully erect member, barely touching it. It twitched and moved as he did this. I knew the delight of that feeling so well; being super aroused but not wanting to rush things.

I was transfixed by the sight before me. I consider myself a straight, married man, although I do privately enjoy occasional gay and bisexual fantasies. Nothing in real life, though; I had always found fantasy to be more than satisfying when I got ideas I wanted to explore. Usually ideas that occurred to me from interactions with real people. I don't think I had ever had one about Zach, though. In all of our many mundane interactions, it just had never occurred to me. Neither of us seemed gay and we had only ever had matter-of-fact conversations. I had seen him with a nice-looking girlfriend, although I think he was currently single. So nothing had ever occurred to give me a reason to think of him sexually before this moment. He was a nice-looking young guy, though. Naturally, I now found myself evaluating him and also comparing to myself. His, after all, was the first aroused and exposed male body I had ever been in the same room with, other than my own. Also, whereas I knew my own naked, aroused body so thoroughly and intimately, his was new to me, and it was intriguing. Making me feel like I needed to see more.

He was in his mid-twenties, although extremely young-looking for his age, whereas I am late forties but keep myself in very good shape. His brown hair was long on top with a big wavy fringe but short on the sides, whereas mine was close-cropped all over. He was extremely clean-shaven, whereas I had a bit of stubble. He had a slim, lightweight build compared to my broad, muscular frame. Neither of us had any fat on us. I am naturally not too hairy, whereas his body appeared to be completely hairless, even down there. I guessed this area was waxed or shaven. It seemed strange to be seeing Zach exposed when I had seen him so many times fully dressed. It had never occurred to me to think how he might look, what size he would be down there or how he would look in such a state of arousal. Even where I had imagined the occasional guy I met, nothing could have caused the powerful arousal that this very immediate situation was having on me.

Catching a real guy in such a vulnerable and private sexual moment was having such an unexpectedly powerful effect on me. I felt incredibly horny seeing him looking like that.

He didn't have a particularly large cock, but it was beautifully proportioned, perfectly straight, and there was a shine to it where he had been rubbing it with oil. It looked rock-hard with the veins bulging. His hairless balls had pulled up tight close to his body, something mine also did when I was extremely turned on. His whole package looked beautiful and sleek. My cock was a bit longer and a lot thicker, and it was starting to throb and swell. Without thinking, my hand went down to touch it lightly through my trousers. I felt like I was in a trance. Maybe, I thought, it was just the memory of touching myself, the way he was, that was turning me on. As if my cock was only growing now out of sympathy for his state. But deep down I knew I was actually aroused by the sight of him.

In my reverie it took me a few seconds to realize his hands had stopped moving and his eyes were staring right into mine. I had been staring at his cock, not his face. I felt like a rabbit caught in the headlights and I think he did also. For several moments we both stared into each other's eyes, not moving. I didn't know what to say or do, but I didn't want the moment just to end. Otherwise surely I would have just turned around and left already.

His erection bobbing around in plain view between us was extremely obvious. For a second, his eyes flickered down to where my hand was still touching my own rigid shaft bulging pretty obviously in my trousers. His eyes met mine again. There was a moment of silent shared communication. He had registered what state I was in, and we both knew that the sight of him had caused it.

He still looked frozen and unsure what to do. It occurred to me that he probably had no experience with men either.

There was something intense between us. Two supposedly straight guys with the shared knowledge of our mutual arousal. A new secret that we had discovered together. We knew each other casually in very different circumstances. I should have walked away, but he looked so good, and I didn't want it to end.

I finally spoke.

"Don't stop," I said almost in a croaked whisper. Until this point I had not said or done anything that exposed my feelings. Until that moment I was just a bloke who caught another bloke having a wank. I hadn't committed myself or admitted I liked what I saw. Now I was taking a risk, especially if he wasn't interested in me at all, and I had just exposed myself as being interested in a man sexually. He could reasonably claim his arousal had nothing to do with me, but mine was clearly caused by seeing him.

He looked intensely at me, still waiting. Maybe he was also weighing up what to do. The trouble was the sight of him was making me so incredibly horny it was overwhelming the cautious side of me. I needed to see more. I took the risk and spoke again.

"I don't want you to stop. I want to watch you."

His cock twitched, and his fingers started moving slowly. Finally, he spoke.

"Come closer."

I walked across the room, aware my own rigid erection was clearly straining against my trousers as I approached. His vulnerable nakedness was now within touching distance below me. I knelt on the sofa beside him, facing him at an angle, and placed my hand on his bare thigh. He placed both hands down on the sofa either side of himself. Almost like a surrender. His beautiful cock now stood alone and unprotected. Calling to me, demanding some attention.

Zach moved a hand to touch my thigh.

He slowly moved his hand up towards the very obvious bulge in my trousers. My cock was trapped tightly sideways, pointing at my left hip. Finally, I felt his hand wrap around and grip my throbbing cock through my trousers. I groaned. Never before had I been held like that by a man. His fingers moved around tracing the edges of my cock through my clothes, and then down and cupping underneath like he was weighing up the shape and feel of my balls. Then he moved it back to stroke my rigid shaft. I could feel it throbbing and twitching under the pressure of his fingers. We had both been watching what his hand was doing intently; we simultaneously looked up and stared into each other's eyes intensely.

I think we were both marvelling at the same thing. "I am doing something sexual, and it's with a guy."

Zach almost moaned as he said, "I hope that feels good. It sure feels good to me. I can't believe I'm saying this, but I need to feel you holding me too."

We both looked back at his shiny bare cock. It looked so rock hard as it twitched there.

I leant down and placed my hand on his bare thigh and slid it up to the top. I could hear that Zach was breathing faster. As it reached its destination, I slid my fingers over the sleek oiled skin of his tight ball sac and then up to the base of his cock. Zach moaned, the skin-on-skin contact felt electric. Never before had I had my fingers wrapped around an erect penis that wasn't my own.

Rather than grip him hard I held him lightly, and my fingers went up and down his shaft, which twitched and throbbed in my hand. I knew what felt good. After all, I had rubbed myself so many countless times before. We both groaned slightly with the mutual pleasure.

He moved both his hands to start undoing my belt and then quickly to the button and fly. Something a woman had done for me many times before, but somehow this felt different. His hands were stronger and more forceful. He pulled my trousers open and I felt his hands stroking my trapped cock again through the thin cotton fabric of my briefs.

He gave it a squeeze and then I felt his fingers pulling at the top edge of my underwear. I couldn't believe how thrilling it felt knowing that I was about to be exposed and erect for the first time in front of a man. He pullled my pants and trousers firmly down to my knees. I felt his hands brush my erection as it sprang free. I let go of him for a second to pull my t-shirt off and quickly kicked off my trousers and footwear.

I was absolutely and totally naked for him now. I knelt back beside him again on the sofa my cock at his face level. I enjoyed the sensation of being so completely naked and exposed to his view and seeing my rigid cock floating around in front of his face, throbbing, huge and red. I only had a small patch of pubic hair above my cock, as my wife had shaved my balls and around the base of my cock which made it look even larger. He stared at it intensely with a hungry look on his face.

"Oh god, that thing is huge, it looks so good. I think I want to do things with that beautiful cock". He said.

It felt so sensitive and I couldn't wait for him to hold it directly with no clothing between us. I looked down at his own twitching rigid erection and thought he must be feeling the same. This time I leant down and gripped him harder and stroked him with more intensity than before.

I felt his hand wrap around my cock at the same time, gripping me firmly as well. To be feeling a man stroking my cock as I stroked his was just blowing my mind. It hardly felt real.

We were both breathing hard in that way you do when you're super aroused. My face was really close to his. Without thinking, I turned my face towards his. Our lips met and in the heat of passion I found myself kissing him hard. Our mouths opened with our tongues probing each other deeply. We were kissing passionately as we stroked each other's cocks. Just the thought that I was kissing a man like a lover was blowing my mind and turning me on beyond anything I'd known before.

We kissed like this for several minutes. It felt a little uncomfortable being bent over for so long. I broke off for a second to move round in front of him. I grabbed his own clothing that was bunched around his thighs and pulled them fully off his smooth, tanned legs. Zach pulled his t-shirt off and threw it on the floor. Now we really were two fully naked guys together. Our erections were pointing at each other.

I needed to get close to him and feel him against me. I knelt with my legs either side of him so that I was sitting on his lap facing him. This brought my cock so that it was now resting against his.

Zach moaned with that first intimate contact. Our eyes met again, and his face turned up to face mine.

I moved in to kiss him again, our tongues intertwined in each other's mouths. My hands reached down to find his. Our fingers interlocked on either side of us as I slowly moved my hips, feeling his slim shaft sliding against my thicker, larger cock. As I moved my hips and ground my cock against his I could feel my bottom sliding on his thighs. He was subtly pumping his hips upwards towards me at the same time.

I broke off the kiss and leant back. We both looked down at the sight of our rigid cocks pressed against each other. Both twitching and throbbing in parallel.

Zach looked into my eyes and said, with a lot of intensity, "I've never been with a man before. I can't really believe I'm saying this. But I want to taste you; I want to take that thing into my mouth right now."

Where I was knelt back with my bum on his lap, I now knelt upright so that my cock was at his face level. His hands gripped me by my hips, then moved round to grip my buttocks. The feel of a man's hands on my naked butt was yet another new and exciting sensation.

I looked down at his face. My large cock was bobbing around, almost touching his mouth. I could feel his warm breath on it. His eyes looked up at me as his tongue came out and licked the tip of my cock. My hand held his face from the side tenderly. We maintained intense eye contact as he opened his mouth and I watched my own cock start to enter his mouth. I felt the warmth and wetness envelope the tip of my cock.

To start with, he was just sucking and licking the head. I felt a strong urge to push my hips forward and enter him more deeply, but I knew I had to let him be in control. This was a first for both of us.

Next, he was kissing and licking all over my head and along the sides of my shaft. As he did this, he moved one hand and cupped my balls, which were tingling and shrunk right against my body. His other hand was moving around my buttocks. Squeezing and stroking them. His fingers kept trailing across my butt crack. As he did this, he started moving his mouth further over my cock, taking more of me into himself. He then started moving his head backwards and forwards, wanking me with his mouth. Sometimes sucking hard, other times I felt his tongue moving around the underside of my shaft.

My own hips were moving subtly as I made small gyrating movements, pumping myself gently into his mouth. As I moved, I could feel his hand on my bum was getting more exploratory on my butt crack. His other hand now joined it on the other side.

I had never felt like this with a woman, but I strongly wanted to feel him touching me there. Both hands now pulled my butt cheeks apart, and one of his fingers began stroking across my sensitive ring. I had never wanted to be touched there before, but right now I wanted Zach to do whatever he wanted with me. I wanted to be his plaything as much as I wanted him to be mine. The realisation hit me that at some point soon he was going to be pushing his cock inside me and I was going to be pushing mine inside him.

As I continued to gyrate above him, pushing my super sensitive cock into his wet and willing mouth I could feel his finger getting more insistent. He was pressing his finger against my tight hole more firmly. For a second, he stopped as he brought his finger around and placed it against my mouth. As his mouth was already occupied, I knew what he wanted to do, I opened my mouth and sucked his finger, tasting my own musty flavour on it. For a moment I sucked it like it was a cock. Once it was nice and wet, he moved it back to my tight hole.

This time he started pushing it harder than before. I wanted him inside me. I pushed my butt back against his finger and relaxed as I let him into me all the way to his top knuckle.

Now as I pumped my cock into his mouth, he was pumping his finger in and out of my butt. It felt so tight and was pressing against all the nerve endings on that hidden gland in a way I had never experienced before. I'd never felt such a strong stimulating feeling of arousal in my life. My breathing was getting more ragged. He was sucking harder. I was pumping into his mouth deeper and deeper. My cock was so rock hard and so sensitive. Every sensation from his mouth was almost overwhelming me.

"Oh god, I am going to cum soon. Ugghh. It's cumming. Zach, I'm going to cum in your mouth!"

Whatever his finger was doing in my butt sent me over the edge. My cock started spasming as I exploded in his mouth. I held his face and pumped my hips into him as he sucked me hard and swallowed every spurt of my orgasm. He tightened his mouth to make a closer grip on my shaft. I hunched over him, hugging his head as he continued to bob over my cock. The spasms were slowing but still coming. The feeling of his mouth and tongue sucking me deep were becoming almost too hard to bear as my cock became super sensitive. Finally the feelings of ecstasy in my genitals subsided and then ended.

I took my softening cock from his mouth and leant down. His hands still gripped my butt with his finger inside me still. I brought my face down to his, and we kissed again like lovers. I could taste myself in his mouth. My own cum swirling around our mouths and tongues. I felt so incredibly horny and so sexy kissing him like this.

I reached down to his still rock-hard cock. We both knew what to do next. I started to lower myself down. He pulled my cheeks apart and removed his finger as I felt it replaced at my entrance by the head of his cock. I was lowering myself onto his cock. It was so much larger than his finger. It felt too big. I wanted him inside me though. I wanted to please him as he had pleased me. I backed off slightly and reached for his bottle of oil and poured some over his cock. I stroked his shaft getting it all oily and slick, and lowered myself down again.

Zach held his cock braced with one hand, his other gripping one of my buttocks, pulling it to help open me to his penetration. I reached back to pull the other one outwards. This time with the oil helping, when I felt his cock head pushing against my sphincter I tried to relax and felt my tight ring open slightly and I let my weight slide me right down his full length. Oh my god it felt so enormous and tight inside me. Zach gasped as I slid down and took him inside myself down to the hilt in one go.

We both sat dead still for a moment, looking deeply into each other's eyes. The enormity of just how gay this was. I was supposedly a straight guy but here I was impaled on another man's cock and loving it. Both his hands now held my butt cheeks. He was inside me and he held my bum, like I was his possession completely. I leant down and we kissed. The feeling of him inside me making it feel even hornier than ever. His tongue pushing into my mouth while his cock was buried inside my arse. The total pressure of his cock pressing against all the nerve endings of my prostate felt so super arousing. Despite having only just cum so hard I still felt so turned on.

I was aware of my semi softened cock laying on his belly my balls squashed against his publc bone. We kissed non stop, even as I started raising myself up his length and then dropped down slowly and then continued slowly moving up and down his shaft. He groaned into my mouth as I rode him.

As we kissed, I had my hands on either side of his head, cupping his face. While his hands were gripping my butt cheeks hard and pushing and pulling me as I moved in each direction. He was making me move up and down his shaft at an increasing rate.

I leant back and he held my hips. I was riding him hard now. My own cock was still partly engorged. It flopped up and down between us as I moved. Slapping his stomach every time I reached the bottom of the stroke. Zach was starting to groan more and more and his breathing was becoming increasingly ragged. The feeling of his cock sliding inside me and his hands roaming all over me was really turning me on, and my own cock was getting hard again. Zach saw this and started giving it attention. One hand stroking it while his other was moving everywhere. One moment he was gripping my butt, then he was squeezing my nipples or fingering the ridges of my abs as I moved around. Zach held my butt hard and groaned as the intensity was reaching a peak.

"Oh fuck, I am going to cum inside you. I'm going to cum inside a man. Oh god I can't stop it. Oh,oh, ungghh."

I could feel his hot cum shooting inside me.

"Kiss me as I cum inside you," he said.

I placed my mouth over his again. Our tongues swirled inside each other as I continued to impale myself on his hard cock. I could feel his cum spurting and the pulses of his cock twitching inside me. His hand was now holding my erect cock and stroking it, even as I continued to ride his. His cum and the oil were leaking out of me around his pistoning shaft.

I continued to kiss him and ride him, milking him of every drop until finally his softening cock slipped out of me.

His cock lay limp below me as I was now grinding my own raging hard on in his hand.

"I want to feel you inside me too. Let's go into my bedroom. I want you to bend me over and take me from behind."

We got up, and he grabbed the oil with one hand and took hold of my cock with the other and led me away like that. I laughed, and as I walked behind him I found myself admiring his beautifully pert bum. I gave it a little love smack as we went into his room. He climbed onto the bed and knelt on all fours.

I got on and moved up behind him. His beautiful bum was hairless and shone with sweat and oil. He laid his upper body flat on the bed, leaving his bum sticking upwards exposing his puckered ring to me which was surprisingly pink. My cock was rigid and begging for attention. I poured some oil over his lower back and rubbed it all over and especially around his ring. I started to push one finger in and then another. My cock was bigger than his and as I started to press my head against his tight ring it felt like it was going to be too tight. Zach was grunting as he felt me pushing my head firmly against the resistance.

Gradually, as I worked my head past that, it started to relax, and it slid further in. I had never felt such tightness around my cock, and at every movement, I marvelled that he could take more of my length. Eventually I was absolutely buried to the hilt. I stayed like that for a moment. Savouring the feeling of his butt cheeks pressed against my pelvis and his slim back in front of me.

I could feel my cock throbbing inside him as it was so tightly squashed on every side. I leant over him and he pushed himself back up onto his hands. He turned his face towards me, and I leant in and we managed to kiss passionately. Our tongues were urgently probing each other while I was buried deep inside him. I leant back again and then started to slowly withdraw my length until only the head was still inside him. Slowly I thrust myself back inside him.

"Oh god, that feels so massive. You're filling me up so much." He moaned

On each withdrawal it got a little bit easier and I started to thrust harder and faster. I withdrew almost to the tip again. This time I thrust myself hard and fast. Zac groaned with the pleasure and the force of it.

"Oh fuck yeah, do me like that."

I started to pump hard and fast into him. Zach was now pushing himself back against me and arching his back. I gripped his slim waist and marvelled at how small and lithe his body felt in my hands. From my view, with his slim hairless back and his shapely butt, he could easily have been a girl.

The only giveaways were his manly voice groaning with every thrust and the subtle sensation of his tight scrotum touching mine on each deep penetration. My hands were gripping his hip bones pulling him into myself, every time I thrust forward. I moved one hand round to feel his cock. It was soft and so small now that I could cup all of it in my hand. I started to stroke it. Zach moaned deep in this throat, enjoying the feeling of me handling him there. I was rewarded with the feeling of his blood flow increasing, and soon he had a semi. I continued pumping into him hard and stroking him with one hand and soon had him rigid again.

"Let's cum together. I want you to face me as I cum. I want to see your cock above me. Ride me and cum on me when I cum inside you," I said.

Zach replied. "Fuck, that sounds so horny."

I pulled out of him and we moved so that I was lying on my back, my head propped up on the pillows and my cock pointing skyward.

Zach straddled me so that initially our cocks were together again. Zach wrapped his hands around both of our cocks and pumped his hairless hard cock along the length of mine. I marvelled at how light and slim he looked on me and the size difference of our cocks. They were so similar in shape and proportions. But mine was much larger.

Zack now raised himself higher and moved forward until his arse was pressing against the head of my cock again. Again the initial moment felt so tight, but this time with his weight helping, he lowered himself smoothly in one smooth movement. I grunted at the tightness of it.

Zach was moaning with the pleasure and started to stroke himself above my belly. He was gyrating and rotating and moving around, creating delightful feelings in my cock. My hands reached up and tweaked his tiny nipples. I rubbed my hands all over his smooth slim body. Zach was now moving himself up and down with more vigour, milking my cock with his arse and stroking his own rigid cock. Wanking it over me. He leant down and we shared another lover's kiss. My hands gripped his butt cheeks as the angle changed on my pistoning cock. Now he held still and I levered my hips up and down. I looked down between our bodies and felt extra arousal to see the slick shaft of my cock as it reappeared from inside Zach and then disappeared as I drove it back inside him. I was gripping both of his buttocks firmly, holding him tight as I did so.

We were both by now panting hard into each other's open mouths. Our tongues swirling around together, both of us moaning with the extreme feelings of pleasure from our sensitive cocks. Zach's was sliding tightly between our bodies. The feeling was building in both of us. I could feel my orgasm was coming close now.

"Zach, I am going to cum."

"Me too."

He sat up again and started moving up and down on me with extra energy. His own cock was twitching, and I knew was almost there.

I started groaning and felt that beautiful feeling as his body moved along the sensitive sides of my cock. Suddenly I started shooting my cum inside him. It felt like long torrents with each spasm. I was moaning continuously now. Zach's eyes met mine. My orgasm was sending him over the edge. He gripped his cock and started stroking it vigorously while moving his body, circling my cock as it impaled him. I was still cumming inside him as his own erupted. His first shot went across my face and mouth. As I started licking my lips and tasting his cum, further ropes of cum spurted over me. Zach was wanking himself over me even as I was still spurting inside him.

Gradually his own orgasm subsided, as did mine inside him. Although I was still feeling the occasional twitch. Zach leant down and licked his own cum from my face, and then his open mouth found mine and our tongues swirled his cum around together in our joined mouths.

We stayed like this for several minutes. I could feel Zach's cock softening and shrinking between our bellies even as my own was inside him until Zach moved himself up and off it.

We stopped kissing, and Zach climbed off me. I felt drained but deeply satisfied. We looked at each other standing naked, and despite everything that had passed, I think both of us felt self-conscious. Zach was looking around for something to put on. I think he felt self-conscious as his cock shrank to a much smaller size. My own was noticeably bigger.

There was an awkwardness now that we were just two naked guys standing in a room together with softened cocks. I reached over and pulled his lithe form towards me. He seemed glad to be pulled back into an embrace. I didn't want this to end in embarrassment or just act like it hadn't happened. I felt his body in my arms and it felt good.

"I can't leave like this. I think we both need a shower."

Zach's face brightened at this. I spoke again.

"I don't know about you, but I don't think I want this to just be a one-off. I know I am married and we have very different lives publicly, but I feel like this wasn't just a one-off. We maybe started something here."

Zach smiled, relieved and hugged me tight. His slim body fitted against my more muscular one so well.

He led me into his shower room. As his landlord, I already knew it well. It was a large open wet room so no partitions were required. Zach ran the shower up to temperature and we had room to stand around it and take turns getting soaked and then soaping each other up. Even as we both gave the other a thorough clean especially around each others bums and swinging cocks we were both, despite everything, starting to swell again.

We stood facing each other and now began kissing passionately again and wanking each other and rubbing our cocks against each other. It wasn't long before those feelings started to build and Zach started cumming onto my own cock and belly. This set me off and I came over Zach in return.

Once that had subsided, we soaped each other up and just had time to get clean properly before the hot water ran out.

We quickly towelled each other off and then went into the lounge to find our clothes and get dressed again.

Zach spoke. "I want more of this, but we have to keep it a secret. Just between us. I am still into girls, so I guess today doesn't make me gay. It just means I am bi. But my friends all think I am straight. Hell, even I thought I was before today. Although I had many feelings privately. I don't think I want to say anything different to my friends, well, not for now anyway.

"Look, Zach, I am in the same boat. Everyone who knows me would be shocked if they knew about this. Even Lisa would be shocked, I love her and fancy her like hell. I have never even been unfaithful to her with a woman, let alone this."

"I take it you won't be telling her then."

"Jesus Zach, how can I? She would be calling me a liar anyway. You know the irony is that I have always been a bit in denial with her. We have had bedroom chats about our fantasies together, and I half-jokingly suggested threesomes. She knew I meant with another girl but pretended she thought I meant with another guy. I kind of got defensive and said, "Of course not! It has to be with a girl." She was trying to get me to tell her my secret fantasies and say if I had ever fantasised about men. I wasn't admitting anything. She then admitted that she sometimes fantasises about girls, both sharing them with me and also just straight-up one-on-one lesbian fantasies.

"When I started getting excited and suggesting we set something up she said it was only for fantasy and not real life. When I protested that she had got my hopes up, she said in that case, it would only be fair if we had a threesome with a guy too. I was curious because I knew the thought of her with a girl was pretty exciting to me. So I asked her how the idea of a threesome with me and another guy turned her on. Was it being fucked by two guys at the same time? She said that was part of the fantasy, but the surprising bit was when she said she would get super turned on just seeing me getting off with a guy. I stupidly killed that part of the conversation by telling her a bit too strongly that that would never happen. I am thinking now I need to revive this conversation with her. When the time is right, of course, and find a way to make her think it's all her idea."

Zach was looking at me with an excited smile on his face. "Well, I feel it's safe to say this now, but your missus is fit as fuck. I have often had secret ideas about Lisa."

"Ok, when the time is right I will see if I get a chance to bring it up then. Carefully, of course."