The bell rang for the next class and all the students started to head down the halls to their next lesson. As luck would have it, both Eric and Susan shared their next class, physics.
As the students filtered into the physics lab, the teacher, Mr Kuhnker, told them there would a practical today. They would be looking at aerodynamics. The teacher paused for dramatic effect, but everyone in the class just sighed. Mr Kuhnker had a beaming smile and annouced that they would be working in teams to see who could make the furthest flying paper plane. Of course, everyone perked up at that at it would be a bit of fun.
Mr Kuhnker started announcing who would be working together, and somehow Eric and Susan were on the same team. They got a few sheets of paper and desk to work at. Susan started working, but Eric couldn't concentrate. He was too busy thinking up perverse things he could make the cheer squad do. Susan didn't really care, she just wanted it to be over. She didn't even talk to him while she worked. She didn't even care he wasn't working.
Eric on the other hand finally came up with a stick twisted idea. He was going to make them squeal everytime they sat down. But it wouldn't be fun if they knew it was coming. Eric turned to Susan and said "You will listen to me until I say I am finished. You will no longer wear anything that directly covers your pussy. You can wear something like a skirt, but certainly no pants or panties. You will try to do as many tasks seated as possible. Everytime you sit down, it will feel like a huge dildo was placed on the seat, and it will feel like it is buried deep in your snatch. You can't tell anyone about this, but you will ride the cock as hard and fast as you can. You will moan and squeal as you feel this cock penetrate your tight cunt. You can't get off the dick until you get off. Once you cum, the dick will disappear. You will then forget that you just fucked a seat. You will also forget this conversation. I am finished".
Susan went back to making her paper plane, but she felt really uncomfortable standing while doing it. Thankfully, there were some chairs just behind her. She went to sit down, and Eric had a huge grin on his face for the show he was about to witness.