The blonde, slim girl with lovely eyes said her name was Lisa and the pretty, busty, brunette called herself Marie. I told them my name, Mike.Frau Gun...her told us each lesson would last two hours. She said there would be two lessons each week plus homework and that ought to ensure we had a good chance of passing our exams. All three of us groaned until Frau hit her desk with the tawse.“Do you want some of this now?” she said, looking at each of us in turn. We fell silent and looked straight. I felt someone take my hands and push them up to the slatsin the headboard and then the cuffs were locked on my wrists.I then felt someone kiss my breast, making a circle aroundmy already erect nipple and then he was off the bed. I wonderedwhat he was doing until I heard a zipper then I realized hewas getting naked. Several other zippers followed so Iassumed everyone was getting naked. Then he was back onthe bed, his knees between my legs, his mouth on my tits….sucking,licking, biting. I moaned. You learn a complete body of maths and it looks like everything there is, and then another layer appears which fits round that, and it seems complete again, but then there is another layer, and another, and another. I want to find the last layer, or at least some part of that layer, but I already know enough to know that so far I know almost nothing.”The Emir nodded. This explanation seemed to mean something to him, though most of the women were at a loss to understand what on earth she meant.. It was Thursday’s chemistry class. I mean, Tessa fucks just about everyone – she doesn’t seem to care about who it is or the reputation she may get. The boys just know she’s there for them. Thursday was Danny’s time. They were both sitting at the same desk writing up their notes. The teacher got all of us to gather round and watch an experiment. He was facing the opposite direction to Tessa and Danny; not that it would have mattered to Tessa.As the experiment proceeded I caught a glimpse of the.