Dupage County Judge Terence Sheen ordered Marco Castro to pay a fine of $750 and he has to perform 120 hours of community service at an agency that works with AIDS patients. He also was put on two years probation and had to write a letter apologizing to Wheaton North High School officials.

Sheen called the prank "beyond stupid." "If you prove to me you're worthy of another chance, in two years, then I will give it to you," Sheen said.

Castro did plead guilty to a misdemeanor disorderly conduct charge with the incident that took place Dec.6. He admitted he took a bottle of ranch dressing from the school's cafeteria where juniors and seniors eat their lunch. He went into the bathroom and ejaculated into the bottle than took it back to the cafeteria. He was reported by other students and he was expelled from Wheaton North High School No one reported becoming ill after the incident took place. Castro told the police he thought of doing it after he had watched a movie that was filled with crude stunts.

"I have no explanation for what I did," Castro said in court. "I felt bad after I did it."

Castro's attorney, Harry Smith, said he felt the teen had been punished enough by humiliating himself and his family plus missing the end of his senior year.

"It has not been without consequences," Smith said.