Bobby had sex with a teacher.

Little Bobby came home from school and proudly announced to his Mom, " I had sex with a teacher today." Mom's infuriated. "Boy, get your ass up to your bedroom. Your father can take care of this when he gets home." When Dad arrives, Mom explains the situation, and Dad, feigning anger, rushes upstairs slamming doors. Charging into his son's room, he exclaims loudly, "Boy, what the hell have you been up to?!?" Then in a whisper, "Hell yeah, son. High five. Got any questions for the old man?" To which, little Bobby replied, " Yeah, Dad. How much longer is my butt gonna hurt?"