Paul and I began with a straightforward top-bottom relationship.

We met at a bar and hit it off, and Paul said he was versatile. I never saw any evidence of that.

He sat on my cock and slid down it that first night together, and I soon fucked him in every position I could. Missionary, reverse cowboy, doggy, the lot. We ended up fucking every day for a month afterward. My cock just seemed to be built for his arse and, once our bodies got to know each other, I gave him a prostate orgasm almost every time.

Paul is just under six feet tall, slim, and handsome. I'm four inches taller and I do go to the gym. I'm a lot more muscular. When we met Paul was twenty-nine and I was thirty.

After dating for a few months, we had fallen in love, and I moved into his house. We soon settled into a pleasant, domestic arrangement. Paul enjoyed cooking and was happy to do the washing and ironing. We seemed to be moving into a 1950's-style, man-and-housewife relationship. We even joked about it.

The sex got better and better. This was the time before PReP but we soon agreed to go raw. It was so much more meaningful to make love naturally.

My sex drive tended to be higher than his. Since I was the top, that didn't matter much. Paul could always lie back and I'd enter him. He'd soon warm up! However, my job at the time meant a lot of travelling and some conferences in big hotels.

I think Paul always knew that when I was away for the night, I would try to find someone to fuck. The conferences at the bigger hotels were easy. I am good at sussing out who's likely to be up for it. If I drew a blank with the delegates, I could pretty much guarantee that one of the staff would be up for it. I don't know why so many gay men like to work in hospitality.

But when I was at home with Paul I wouldn't stray. He played with my muscles constantly. He loved my cock. It's nearly eight inches long and quite thick. He told me he fell in love with my cock before he fell in love with me. I loved his pussy and his throat and used them whenever I chose.

I don't know when I stopped touching his cock. I'd sucked him off and wanked him at the start of our relationship, but things had changed. Eventually, I told him he shouldn't play with his own cock when I was fucking him. I wanted him to get all his pleasure from his pussy. I trained him to be totally pussy-centric. He was more and more sub, while I was dom.

The relationship went from strength to strength, with me only having sex with other men when I wasn't at home.

But then I met Matty.

I went to the pub with some friends, one of whom, John, brought Matty, his new boyfriend.

Matty was twenty-eight, beautiful, blond, and I think my mouth was open wide as he walked in. He looked at me intently as he sat down, opposite me. I shook his hand and held on a bit longer than was natural. I kept eye contact and then winked.

Matty blushed a little, and John went to get a round of drinks.

I asked Matty a little about himself and complimented him. I said he could be a model. Matty thanked me and told me I was handsome. He said he could see I went to the gym. The other guys laughed at our conversation.

"Better not tell John," one said.

As the evening progressed, Matty changed his seat. He sat next to me. It gave me the chance to put my hand on his knee under the table. He didn't move away. John was getting a bit uncomfortable that we were sitting so closely. I don't think he could see where my hand was.

He bragged about how he and Matty were planning a weekend away together and made a point of telling Matty I had a boyfriend. At that point, I moved my hand a little further, now caressing his inner thigh while I just chatted to the other guys.

When it was my round, I went to the bar, and Matty offered to help me. At the bar, I whispered to him: "I really want to fuck you."

He nodded. "I want that," he said.

We took the drinks to the table and drank up quickly. I knew this was not going to make me very popular with my friends, but the attraction was overwhelming.

"Guys, I've got to go," I said, draining my pint.

Matty said, "Me, too."

John looked bamboozled. "What, Matt?"

"Sorry, John," he said. "I'm going back with Chris."

"But Chris has a boyfriend," John said.

I replied, "Really sorry, John. You've only been together a week or two. It's not like he's the love of your life."

Of course, what really hurt was his pride. He swore at me and told me he'd never speak to me again. Ten years of friendship were over. The other guys said I was a shit. Part of me agreed with them. But my cock was in charge now. I held Matty's hand and guided him out of the pub.

"Where are we going to go," he asked.

I hadn't really thought about that. "Do you not have a place?"

"I'm in the doctors' accommodation at the hospital," he said. Turned out he'd just moved to the town and was a junior doctor, looking for somewhere permanent to live.

"We'll just have to go back to mine," I said. I thought about Paul. I'd have to make him understand.

We got a cab and were soon back at my home. I unlocked the door. Paul was still up, watching television.

"Paul, this is Matty," I said, introducing him.

"Hello?" Paul was confused.

I came straight out with it. "I'm sorry about this, Paul, but Matty and I are going to spend the night together."

Matty was standing next to me and I rubbed his arse in what I hoped was a reassuring way. Paul was speechless. He murmured an "OK," and looked away. I kissed him and said nothing would ever change between us. Then I led Matty to the spare bedroom.

As I peeled off Matty's clothes and revealed his taut, defined body, I didn't give Paul a second thought. We kissed deeply and began that special and exciting time when we explored each other's bodies for the first time. He licked down my body from my Adam's apple, down between my pec muscles, down my stomach, over my belly button towards my cock.

I was so hard. But, instead of sucking my cock, he licked my balls and then sucked them. I began to finger his hole as he did that. When he moved to lick and then suck and deep throat my cock it was electric.

I wondered about cumming in his mouth but decided I really needed to fuck him for our first orgasm. I pulled away and moved to his pussy hole. I licked it, rimmed it. I just knew it was meant for me. There was some lube on the bedside table. I lubed him and my cock, and pushed him into the missionary position. I wanted to look into his eyes as I entered him for the first time.

I didn't even think about using a condom. As I began the fuck, I noticed he didn't touch his own cock. He was a real, natural bottom.

The first fuck, as is often the case, was quite quick. But I gave Matty a prostate orgasm. Very rare for the first time two men fuck. The following two lasted longer and were even more satisfying.

We drifted off to sleep and woke to the smell of coffee coming from the kitchen at about 10 am.

My heart sank. I had to face Paul. I put on a dressing gown and went to him. I kissed him. Paul looked at me. He was calm.

"I always knew this day would come," he said.

"What day?"

"The day you found someone better than me and you'd leave me."

"I'm not going to leave you," I said. "I love you. He isn't 'better than you'."

Paul looked at me. "I could see immediately it wouldn't just be sex with him," he said.

I said that I had enjoyed having sex with him and admitted I'd like to do it again.

"But I'll always want you," I said.

Matty then sheepishly came into the room, wearing last night's clothes. Paul asked him if he'd like a coffee and maybe some breakfast. That I didn't expect. Matty said yes and the awkwardness I'd expected didn't happen. The conversation soon moved on from the food to other topics and they seemed to get on.

I looked at them both. I was in love with Paul. I could see myself falling in love with Matty. It seemed so confusing.

More to come.