Let's have some fun with the class...

James grinned as he watched the professor pack up and leave the class. He wanted to play around with the class and see what he could do.

First, he popped himself off his plug with only a slight pang of disappointment. Before anyone else could get up, he had all the plugs swell dramatically at the flare, essentially locking the rest of the guys in the class to their seats. They looked shocked at their sudden inability to free themselves of the plug before he upped the vibration positioned right next to their prostrates. Their aborted motions to stand up stopped and loud groans filled the hall. With another thought, cock rings appeared around their naked cocks to prevent anyone from coming too soon.

He looked around the classroom in satisfaction and more than a bit of horniness. Guys had completely forgotten where they were, and what was happening, moaning and writhing desperately trying to get off. He did so love a bit of orgasm denial.