"The Bad Student"

I couldn't make it smaller than 150 words

He watched the teacher but didn't listen. His pants tightened while he thought of removing hers. Somehow she knew. "Come to the front of the class." He tried to protest but his mouth stayed quiet and his legs obeyed the teacher. "Pull down your pants." His hands followed her orders without his head's permission. "This boy isn't on task and his thoughts are inappropriate." She took a knife from her desk drawer. He couldn't move a muscle. She stopped his erection with one stroke. He screamed without a sound. His hand wouldn't hold the wound. The blood formed a puddle. The confiscated genitalia went in the drawer. "Don't be that boy." He awoke at his desk. His body was whole but his mind was injured. Class continued as usual but it was very unusual how the teacher gave him a knowing look and a whispered message. "Don't be that boy."