By the time Carl and Doreen got downstairs, Mr. Martin's car was waiting outside. Doreen ushered Carl out of the door and made him wait while she locked and checked the door then, with a little wave towards the car, ushered him down the path and, opening the rear door of the car as if he wouldn't be able to manage that himself, stood while he got in the back.

'Now, I don't want you to be nervous, Carl,' said Mr. Martin, as he carefully manoeuvred the car out of its space. 'These are all professional people and they just need some guidance on how best to look after the young men in their care. There is absolutely nothing to worry about. I and Doreen will be there at all times.'

'Yes, Mr. Martin,' said Carl, though it was already too late to not be nervous. His heart was beating hard at the idea of being stripped naked in front of a room full of teachers and by the time they arrived outside the building, he was trying not to get an erection, thinking how embarrassing it would be when Mr. Martin started the demonstration if he was already hard, having all those people look at his cock and wondering why on earth he was turned on like that.

Walking through the school halls, Carl tried to put his hands in front of his groin, knowing that what was in his smart grey trousers was already quite visible, but Doreen, as usual, batted his hands away as if it was the rudest thing in the world to want to cover his modesty. She even gave him an angry little scowl as if to say, 'Don't you dare embarrass me!' The fact that she had not given Carl his usual morning milking was making it even harder for him to fight his erection.

As the doors to what turned out to be a medium-sized hall opened, Carl could see that there were around 20 or so women of varying ages. The youngest was near to his own age, maybe 22, the oldest... well, Mr. Martin was probably the oldest but there were some women his age. There was a chair prepared for Doreen at the side of a little stage and a table with some notes on the stage itself. Mr. Martin showed Doreen to her place, then stepped onto the platform, nodding to Carl to join him. The buzz in the room quietened down as Mr. Martin walked towards his notes, all attention soon on the stage... and on a blushing Carl.

'Thank you very much for coming,' said Mr. Martin, addressing the room. 'And thank you too...' now looking at Doreen, 'for allowing us to use your young man like this.' There was a little laughter in the room as he said 'use your young man' but Carl certainly felt like he was about to be used.

'As you know, we're here to learn about the young male body and I couldn't put you           - and Carl - in any better hands than those of Mrs. Martin, my wife, whose experience with young men is second to none.' There was a titter at this but Mrs. Martin stepped onto the stage and immediately regained the room. She was a woman in her 60s, smartly dressed, glasses and hair that looked like it would be hard to the touch. She was nice looking but by no means pretty.

'I know you are educated people, so you think you know all about the male body but you probably have never seen one from the angles we're going to explore this morning,' she started, immediately grabbing the attention of everyone. 'We're also here to talk about sperm management, and why it's sometimes necessary to milk a young man to control his behaviour... all in his own best interests, of course.'

Then, turning to Carl... 'This is Carl. Say hello Carl.'

Carl, whose eyes had been turned studiously to the ground, looked up and said, shyly, 'Hello...' taking in all the faces looking at him. Particularly a couple of older women maybe in their fifties in the front row who were smiling at him and sneaking glances at each other.

'So, first, let's get Carl to take his shirt off...' said Mrs. Martin, looking at Carl. Carl was frozen. 'Carl...?' Carl reached to the top button of his shirt but his fingers were stiff, he couldn't seem even to get a grip... on a simple button. Mrs. Martin chuckled. 'I think we're going to need some assistance...'

Without even waiting to be chosen, the two women in the front row -- one completely grey and matronly, the other slightly younger with thick black hair, both fairly slim and in smartish dresses -- stepped towards the little stage.

'Thank you, Mrs...?' 'Smith, but call me Davina,' said the one with the grey hair. 'And Elaine,' said the other.

'I wonder if you could help Carl here with this shirt, that seems to be giving him some trouble,' said Mrs. Martin with a grin. Carl noticed the two women smirk at each other as they reached forward, Davina starting at the bottom of the shirt, untugging it from his trousers, Elaine at the top, looking Carl in the eye as he undid the tricky button. Carl looked away, his face burning with embarrassment and fizzing with arousal.

When the buttons were undone, Davina pulled the shirt down Carl's arms and, as if as a joke for the people watching, sniffed it. She smiled as if it smelled good as the women in the audience appraised Carl's naked torso, muttering to each other and raising their eyebrows in appreciation. Someone took their glasses off to have a better look, another put theirs on. 'Thank you, ladies. Now, Carl, if you could just take your shoes off.' Carl went to bend down and, thinking better of it, just scooped each of his shoes off with the toe of the opposite foot.

'Now, if you could help Carl with his trousers...'

Davina and Elaine looked at each other again, grinned, looked at the audience. Davina breathed comically into her hands as if he was warming them up for the task, then reached forward and undid the button on Carl's trousers, then indicated for Elaine to undo the zip. Carl could feel Elaine's hand against his penis as she slowly pulled down the zip, pretending to have trouble with it, just to keep her hand there longer.

The trousers, being a little tight, took a couple of tugs from Elaine, now bending, to get them down. 'Step out,' she said, looking up at Carl, who was so conscious that he was now there in a room of women -- Mr. Johnson seemed to have taken his leave - his penis already half erect and straining against the thin white fabric of the briefs. Looking down, he noticed Elaine - whose face was at the level of the briefs - take a look then shoot a glance at Davina, who raised his eyebrows and smiled.

'Now, if I could get you ladies to stand back for a moment... I just want to point out some things here. Firstly, I don't know if you have noticed but Carl is already fairly aroused by this experience...' She looked at Carl's bulge as did the rest of the room. Carl could feel twenty pairs of eyes on his bulging penis, which only made it bulge further until it was fully erect and barely contained within the tiny briefs, which were being pushed away from his body. 'And becoming more aroused by the minute,' she joked, the audience laughing at the quip.

'And if you look closely...' Mrs. Martin approached Carl and put her finger at the very end of his penis... 'You can see that there is already precum. You see that little stain? At this age, men are very prone to producing a lot of precum, even before they have been touched. It's quite normal, nothing to worry about. Now, if I could get our assistants to...'

Davina and Elaine stepped forward without any further invitation and with one on either side, Carl could feel the briefs being pulled down until they caught on his erection and Davina put a finger inside to get them over the hurdle. Elaine dropped to the ground to help Carl step out of them, but as he did, Carl's penis flopped out and hit her in the face. She laughed, for the rest of the room, and comically licked her lips.

Carl was now naked in just white socks with everyone in the room -- Mrs. Martin, Davina, Elaine, Doreen and all the other women -- looking at him, focussing, it seemed when he dared to glance up, on his now fully erect penis, so hard it was almost standing flat against his smooth belly.

'So, you can see...' started Mrs. Martin, 'that at the age of... How old are you Carl?'

'Eighteen,' said Carl, his voice cracking.

'Speak up, boy,' said Mrs. Martin, a little harshly.

'Eighteen, Miss. Sorry, Miss,' said Carl, coughing.

'So, you can see that at the age of eighteen, the penis pretty much has a mind of its own. We haven't even touched it yet and it's standing pretty much against this young man's body. And if I were to do this...' She reached over and touched one of Carl's hairless nipples at which Carl's penis twitched and started leaking a stream of precum which ran down the underside for the whole room to see. 'The connection between the nipple and the penis is so strong on some young men that you can almost control the penis through the nipples. But that's not really what we're here for.'

Carl stole a glance over at Doreen sitting quietly at the side of the stage. She was smiling a small, proud smile as if Carl was doing well. It somehow made Carl feel better, more relaxed... but still very aware of his twitching erection and the bead of precum that by now had hit his shaven balls.

'And remember that this precum is quite harmless, actually quite tasty...' and Mrs. Martin put out a finger, scooped the trail of precum, going from Carl's balls to the tip of his penis, and put her finger in her mouth.

Carl noticed Davina and Elaine look at each other. The look seemed to say that they wanted a taste of him.

'And now, before we go any further, I'd like to ask our volunteers if they could get down on their knees...' Elaine and Davina kneeled immediately... 'and smell Carl's testicles for me.' The women moved towards Carl, with Davina going straight in for a deep inhale of Carl's balls. Carl could feel her breath against his shaved pubic area and then the light touch of her nose against his balls. Elaine waited, staring right at the new droplet of precum that had appeared at the top of Carl's penis. 'Can I...?' he said, looking up at Mrs. Martin.

'Of course. Taste it and tell us what it's like. In the meantime, Mrs... Davina, how do the testicles smell?'

'Fairly strongly, Mrs. Martin,' she said. 'Clean, soapy but still quite musky.'

'That's because the pheromones of young men are mostly present in their testicles and in the area around the anus, but more of that later. And the precum? How was that?'

'Just very sweet and quite sticky. Delicious, actually.'

Carl blushed so hard it reached down to his chest and his little nipples, which were now standing hard and erect from excitement and a little from the cold of the room, even though he was burning hot.

'And this part of the penis on the underside, you'll notice...' started Mrs. Martin, Davina and Elaine still on their knees with Carl's erection so close to their faces that Carl could still feel their breath on him... 'has started to bulge. This is the part where the sperm will travel to be released. You'll also see a swelling... Turn round, Carl, and bend over...'

She said it so matter-of-fact-ly that Carl didn't hesitate but just turned and bent over, only when he was in position realising that his shaved hole was now exposed to the room.

'I'm not looking at the anus here,' said Mrs. Martin, 'but at the perineum, the part of the body that runs from behind the testicles to the anus. Spread your legs further, Carl, so we can see more clearly.'

Carl did as he was told and could immediately feel a finger running along the hardened ridge between his balls and his hole. 'This bit gets hard, ready to carry the sperm. It actually pumps the sperm so you can physically feel it, but we'll get to that later. Davina, would you like to feel?'

Davina didn't need asking twice, and as Mrs. Martin's finger was removed from Carl's most private place, he felt another replace it, then another finger -- Elaine's -- join it. But they weren't just touching it, they were massaging it, stroking it, making another long string of precum leak from Carl's penis and descend slowly towards the floor, except Davina put a finger out, unseen by anyone, and scooped the precum into her mouth.

'And while our volunteers feel Carl's perineum... Hard, isn't it?' They nodded, looking at each other in disbelief that this was actually happening. '...You might notice that his anus is contracting. It's almost as if his body is asking for something to touch it, enter it even.'

Davina and Elaine, their heads almost together, looked up from their caressing of Carl's underneath to see his hole, shaved and pink and beautiful, winking. It was all they could do to resist touching it, putting their fingers in it, putting their tongues in... but they had a feeling the time would come if they were patient.

Bending over in front of twenty people with two older women touching him - no, not touching him... caressing him - on the hard ridge between his legs while drops of precum leaked from the end of his penis onto the floor - or onto the fingers of the two women - Carl couldn't have felt more embarrassed. Or he thought he couldn't. Even with his elderly hostess sitting there proudly enjoying the attention this room of educated women was giving him, his face was still burning with shame.

'And while we have Carl in this position,' said Mrs. Johnson, 'before we examine his anus, let's just take a moment to notice the line that runs along the perineum to the anus and to the testicles and right up the centre of the testicles. Isn't that interesting? Like a line dividing him in two...'

Half for me, half for you, thought both of the women with their faces right up against Carl's bent over figure. Davina ran her finger along the line, as if to demonstrate for the room. She could feel a pulsating in the hardened perineum and noticed Carl's penis bob up and down, leaking a little more of the precum as his prostate pumped.

'Now we're not going to spend long on Carl's anus,' said Mrs. Johnson, matter-of-factly, 'but I did just want to indicate the power of anal probing as I was explaining to Carl's hostess Doreen recently. If I could get you two ladies to pull Carl's buttocks apart... Carl, do you need something to lean on?'

Carl nodded, indicating that he did at which another woman, this one younger -- with horror, Carl recognised her as a girl from his Sixth Form! - came up onto the stage with what looked like a sports bench of some sort. Positioning it in front of Carl, so that he could lean forward and rest on his elbows, the girl stood back to make sure he'd placed it right. Carl looked up but noticed she was not looking at his face but at his penis, clearly captivated by the bobbing, leaking thing.

'Thank you, Danielle,' said Mrs. Johnson, moving forward so she was level with Carl's up-turned backside, and standing so close that Carl could feel the material of her skirt on his bare flesh and the heat from her body against him.

'Now, if I could get you ladies to spread these buttocks again...' Davina and Elaine didn't need much encouragement. Each of them hooked the four fingertips of one hand to the inner curve of Carl's bottom and scooped outward, the flesh almost trembling in their grip.

'And there you have it,' said Mrs. Johnson, 'the anus of a sexually aroused young man. Isn't it lovely? Obviously, this has been specially shaved for us by Doreen...' A small ripple of applause broke out as people looked round at Doreen sitting proudly at the back.

'Some boys of Carl's age will have quite a bit of hair down here so it's good to shave away just so you can see what you're dealing with and what you're doing. It's also a very good way of maintaining high hygiene levels.'

With his little pink hole, completely bare of all hair, now the centre of attention for a whole roomful of people, Carl realised his earlier embarrassment was nothing compared to this. His face burned with shame and one of his legs started to tremble with... was it fear or cold or excitement?

'Now, when entering a young man's anus with your finger, you should use lubrication but I've always found...' and she put her own finger in her mouth and sucked it, 'that a little saliva will always do the trick if you don't have lubrication to hand. Make it nice and sticky and then...'

With his buttocks still being stretched apart, Carl felt the finger of Mrs. Johnson's approach his hole. First it stroked the hole... 'Rub a little of the saliva or the lubricant around the area...' then began to penetrate it. 'Be careful and go slowly,' said Mrs. Johnson as Carl let out an involuntary grunt of pleasure.

'You see, so far I only have my finger in down to the first knuckle. A little more saliva...' And Carl could feel something hit his backside, just above his anus: Mrs. Johnson was dribbling on his hole... 'and you can get in up to the second knuckle. Is that alright, Carl?'

Carl nodded.

'We can't hear you...'

'Yes, Miss. That is OK, Miss,' Carl managed through gritted teeth.

'And now all the way...' and her middle finger slipped all the way into Carl's tight anus. Carl let out another involuntary moan. 'I think we can already see the effect this is having on Carl.'

Elaine and Davina, whose eyes were just inches from Mrs. Johnson's finger, which they could see massaging the inside of Carl's hole, sat open-mouthed, sorely tempted to touch themselves but resisting that temptation in front of so many of their colleagues.

'Now I don't know if you can see from back there but I'm slowly rotating my finger, massaging the inside of the anus and the prostate...' Carl now was really starting to moan even though he was biting his lips in an attempt not to let out a sound. 'And as you can hear, this is really touching Carl...' There was a little laughter at the joke.

'And if you look underneath, you'll see that Carl's penis is really twitching, absolutely out of his control. And that there is a far greater amount of fluid - precum - leaking from the end of his penis. Davina, could you put your hand there and collect some just so we can show the people?'

Without letting go of Carl's buttock, Davina reached between his legs and put her finger on the tip of Carl's penis, which seemed to release even more precum. 'Whoa!' went Davina, bringing her hand back with a rope of precum joining it to the end of Carl's penis. 'That's a lot!' There was so much, in fact, that Elaine also put her finger forward and also came back with a string of precum attached to it. There was some muttering in the audience and Carl, from upside down, could see Davina and Elaine secretly feeding his precum into their mouths.

'So you see the power of an anal insertion,' continued Mrs. Johnson, slowly withdrawing her finger. 'And... good boy Carl. Absolutely clean.' At this, Carl blushed deeply, more embarrassed than ever. 'And I think we need to take a break from the presentation, just in case anyone needs to use the bathrooms or get a coffee from the table you can see at the back. But we'll keep Carl with us, just in case anyone wants an up-close inspection while we wait for the second part of the talk, which will include a live milking.'

Davina and Carl both got to their feet and gave little comedy bows as if they had been the assistants in the magic act. 'And Carl, if you straighten up...' said Mrs. Johnson, 'and stand right here, anyone who wants to come and get a closer look or ask any questions, I'll be here to talk you through anything you've seen so far this morning.'

Davina and Elaine went back to their seats, smiling at each other and at some of the other people in the room and occasionally putting the fingers they'd scooped Carl's precum with to their mouths and noses. Some of the spectators got up and made an exit, presumably to go to the bathroom, some went to the back of the room, chatting, to get a coffee before returning to their seats.

Danielle, the girl from Carl's Sixth Form who had brought the bench up for him to lean on, came towards the stage where Carl was standing naked and erect beside Mrs. Johnson. She was tall, not really that pretty and, fairly skinny. 'I'm sorry,' she said, approaching Mrs. Johnson but with her eyes firmly on Carl's penis, which was still dripping the occasional droplet of precum onto the floor, 'but is that always the case that more precum is produced if you perform an anal probe?'

As she asked this question, a new droplet appeared at the end of Carl's penis and Mrs. Johnson gave a quick nod as if to say, 'Go ahead! Try it!' which Danielle did, scooping the precum onto her finger then putting it to her mouth. 'Mmm, that's sweet,' she said.

'Yes, and in answer to your question, usually... Precum is a personal thing that varies from penis to penis but in general any massaging of the prostate, which is what you could see me doing, will produce more precum as the prostate is actually the gland that produces sperm and pumps it from the penis. You can actually make a man ejaculate without touching his penis by massaging his prostate from inside his anus.' Danielle raised her eyebrows, impressed as she accidentally - though Carl wasn't sure how accidental it was - brushed Carl's penis with the back of her hand.

'It really is a very beautiful penis, isn't it?' continued Danielle, actually crouching down and examining it close up. Carl could actually feel her breath on it as she looked at it from all angles.

'It's an excellent penis,' said Mrs. Johnson. 'Carl is actually a very good specimen. I mean, look how big his testicles are, even though Doreen milks the sperm out of them at least once a day...' As she said this, she cupped Carl's balls in his hand.

'Oh can I smell the musk while I'm here?' asked Danielle, to which Mrs. Johnson just gave a nod while Carl felt this girl's nose actually touch his scrotum. 'Oh, yes, that's quite strong. But clean-smelling. Would you mind if I took a photo?' Mrs. Johnson shrugged as Danielle retrieved her phone from her pocket and actually took a selfie with Carl's erect penis just on her shoulder, no doubt to show her friends.

'But it seems we have quite a line of people waiting, if there's nothing else...' said Mrs. Johnson, ushering Danielle to the other side of the stage. 'We still have a full milking to demonstrate yet...'