It's been a few weeks now since we've allowed free use between 18 students and teachers. It's great, but to be honest, it can be taxing. I forgot just how horny we are at that age! It's nice to be appreciated but it can be challenging to teach something when students are literally crawling over each other to be the first one on your dick. I've taken to sometimes walking around the room with my hard cock out, and just letting the students suck or stroke as they wish when I pass, it's better to let them do it so they can focus on their work. Then I pick one student based on the mood I'm in, and have her get out of her chair and lean on it, so she can continue working as I fuck her from behind until the end of the lesson.

Last Friday I was sitting at my desk, it was the morning when the students were still arriving, some chatting, some using each other, some finishing homework, some seeking out their favourite teacher before school starts. This day I had Bee, a tall, mousy-blonde girl with a tight athletic body, sucking my cock under the table as I finished some notes (she likes to start her day like this two or three times a week). My door opened and Liz came in, she already had, I'd say about 5 loads dripping from her face and her tits were out, god they were incredible. She was just passing through and told me that she had sent an email onto me for my approval. Although I didn't officially hold any position of authority within the school, as the teacher who had orchestrated allowing free use between students and staff, I was considered the unofficial principal of free use matters.

I opened my laptop to check the email, Bee shifted slightly so she could lick my balls for a bit as I readjusted how I was sitting before going back to throating my cock. There was an email there from the, honestly generically named "Breeders IE". They said that they had heard of our school going free use and we're offering a school visit to teacher the students about their programme. After perusing their website, I thought it sounded great so I booked it for a fortnight later. The benefits of free use with students kept growing so I decided I deserved a reward, I wheeled back my chair, and put my hands on Bee's head to control the tempo, and I came in her mouth.

A fortnight later, the students of the free use classes (everyone who is 18 and has their free use license) had been told that there was a special assembly on today. They, and the staff working in the free use wing this month, all gathered in the hall. I was sitting up at the side with Bee once again sucking my cock, she was nude this time though and after a while Jim, a student, began fucking her from behind, I think it might have been anal actually but I'm not sure. Once everyone was gathered, the curtains on the stage were drawn away. There were some gasps and giggles from the audience. I don't know what they were expecting, but about a dozen women, all nude, bent over something that looked to me like a long saw horse, loosely tied by the wrists and ankles so that their pussies were presenting to the crowd, probably wasn't what people had in mind.

Another woman and a man, wearing jumpers and jeans (what my mind instantly called "farmer clothes") came on stage and introduced themselves as Ben and Marie. "We are from Breeders IE and our programme is very simple: some women want to be pregnant, they don't care who the father is but they want to be pregnant, in our free use society, birth control methods are so effective that accidental pregnancies are a thing of the past. Now if you want to feel pregnant, or if you want to be used by men who want to get you pregnant, or frankly if you just like the thought of being used without any protection by whoever wants to, or if you want to use someone, thats what we facilitate".

They went on to explain their safety measures and their process. After answering some questions, they asked for a volunteer. Bee actually stopped giving me head to go on stage, which was disappointing. They told her that it was good she was naked, because they'd have had to get her to strip anyway. Even in our school, being completely naked on stage in front of all your classmates and teachers was probably nerve-wracking, or exciting. Marie told her to stand still while Ben did a full inspection, he pinched her nipples, measured her hips, even checked her teeth, he had her spread her legs and pull her ass cheeks apart so he could investigate everything going on. During this examination he spoke aloud about what he was looking for and if she measured up. He came to the conclusion that she was in great health but her hips were narrow and her boobs were slightly on the small side and she wasn't a perfect specimen to be a "cow" as he called it. He called up four more students and did the same process, arranging them on the stage from best to worst breeding material as he did so. For the last student he called up a male student to assist in the examination.

He and Marie answered a few more questions: how to sign up, how many visitors does the farm get, is there a factory and free range section, how do they choose their live-in studs etc. He asked then if the volunteers would like a go being cows. They explained everything and it was great to hear how clearly voluntary and mutually enjoyable the business appeared to be, nobody did anything that wasn't exactly what they wanted. They all very eagerly agreed, I could actually see the glistening wetness of Lisa's pussy from where I was sitting. They brought out a second saw horse. The first one was still there with those women still strapped to it, apparently happy to just be there. The five volunteers were strapped to the saw horse. Marie then said "Mr. Williams, as thanks for you allowing us to be here today, would you like to have the first turn of the day with these temporary cows?" I felt it rude to refuse, and I was rock hard by this point, so I mounted the stage to some light applause (a lot of hands were otherwise occupied) and walked by all my students. I smacked each ass in turn to see how it jiggled, pressed up against each person from behind and groped their tits on the other side of the saw horse. After this, I decided to start with Bee, I rammed my cock into her dripping pussy and fucked it vigorously to some cheers. In the spirit of the event, I fucked each in turn, marvelling at how different these different pussies felt. These temporary cows stayed there, occasionally trying to drive themselves against me. I pulled out of the last student and said to Ben that I was trying to decide in which student to cum. He said that, to educate the students, I should keep breeding in mind. The temporary cows heard this and they started telling me different information, how fertile they were, when their last period was, if they thought they were ovulating and more. I eventually choose Méabh, who's line of "if you cum in me, I won't be here for the start of next term because I am so fertile that I will be pregnant" drew me in. She was second best in terms of the ranking. I pushed myself back inside her, grabbed her red hair with both hands, and started thrusting hard into her again until I doubled over as I came inside her pussy. I may have been imagining it but I thought I heard a disappointed sigh from Bee. I resolved then to cum in her pussy tomorrow or later on today, hopefully it will cheer her up.

I withdrew and closed my fly, as I did Marie reminded the "breeding stock" not to push the cum out. I turned to see a queue of male students (and staff) along the side of the hall. Ben and Marie explained that their dozen breeding cows will be here all day, but the five student volunteers may only stay until half nine, because they have classes to go to. With that, they said "enjoy!" And the stage was flooded with seventeen males, all at a cow, I was happy to see Bee wasn't chosen last. They all got to it, and as they came, they walked away, some taking longer than others, and were instantly replaced, other men sliding their cocks through cum in order to add to it.

We had to almost physically remove the students from the hall at half nine. The girls were all a little dazed and light-headed from being bent over for so long and fucked so much, some needed to sit down, some helped each other push as much cum up into their pussies as they could. The men in the queue were allowed an extra ten minutes to try to get to one of the permanent breeding stock, but after that they'd have to wait until a free class or break time. One of the volunteers went for a shower before class, not before taking a leaflet on their summer programme though, the rest of them stayed naked, as they left.

When I went to my first class of the day, Saoirse, another volunteer, was on all fours in the centre of the classroom, a small pool of cum forming from what inevitably leaked out of her, and she spent that lesson and maybe more after it, still being bred by other students (I may have made a deposit of my own towards the end of the lesson, if I'm honest).

All in all, successful assembly.