The act of pleasuring oneself sexually. It happens most in males who are unable to quell their sexual desire at any given time.
Joe watched as Lexi walked to the front of the room, her perfect ass shaking back and forth with every step. He felt his penis stiffen. Looking down he saw the bulge in his pants.
Lexi turned and faced the class making her double d cups jiggle. This only perpetuated Joe's hard on. He tried to push it down with his hands but this only made him harder. His penis pushed up against his hands and broke through his flies.
Suddenly Joe looked up and saw that Lexi had her eyes on him. Joe's rod kept growing and he began to shiver.
Lexi began to dance, slowly shaking her hips. As Joe began to drool, Lexi reached down and unbuttoned her pants. In one motion she pulled them down, revealing a pink thong.
Joe's breathing increased as his penis rubbed against the top off his. Lexi pulled her shirt over her head and threw it towards Joe's feet. She was wearing a matching bra. As her eyes focused back on Joe her huge boobs jiggled.
Joe couldn't take it anymore. He grabbed his exposed penis and began to masturbate. He began to moan as he felt his load building up.
By now the entire class had taken notice and gathered around his desk, but Joe couldn't stop. With a few more rubs he ejaculated, spraying shot after shot of hot sperm.
As Joe opened his eyes he saw Lexi, fully clothed, standing in front of him with her hand covering her mouth. She was staring at his penis.
Suddenly he realized he had imagined the entire thing. Frantically he ran to the door and headed for the bathroom.