It was the first day of school in grade eight. We were all sitting in English class listening to the teacher talk about the new school year and all the boring stuff that we would be learning.
The desks were set up in a way that they were all facing inwards. Across the classroom was a girl that I hadn't seen since I graduated elementary school. She had become very attractive in those few years. She had long brown hair and was wearing skinny jeans and a tight t-shirt. I was checking out her small but firm tits and and could see the outline of her bra, and before I knew it I had a boner.
She looked towards me and I looked away, but I couldn't help it. As soon as I she looked away I was staring at her. She had her legs crossed under her desk and was leaning forward slightly. At this point I had never considered masturbating in class, but I couldn't help it. Just the idea that I could watch her as I came got me so wet.
I was wearing a rather tight pair of jeans. I realized that if I closed my legs just enough, my thighs would put so much pressure on my dick. I could contract my leg muscles in such a way that I could get off. So I started slowly as I watched her, being careful not to be caught staring.
Eventually I couldn't help it. As my heart beat faster and faster, I looked her right in the eyes as I closed my legs so tight on my boner that I had the most intense orgasm ever! I had to try so hard not to make a sound as I came in my pants. I twitched and jerked slightly, barely able to restrain myself. It was pure ecstasy, and she was so beautiful, and so clueless as to what I had just done!
After it was all over, I took one last look at her, smiled, and spent the rest of the class with cum in my pants.