When I found out that this guy was staying after class to work on some science homework, I figured I'd stay back, too. I couldn't concentrate on my work at all, so I told him that I sometimes masturbate before doing homework because it helps me focus. One thing led to another, and before I knew it, I was naked on the desk and he was jacking off! I'd never actually seen a guy do that before, so it really turned me on. Luckily, I keep my sex toys in my backpack because my parents snoop around my room. I pulled out my favorite one, a thick clear cock, and I used it to make myself cum. I kinda wished I had let him fuck me, though.