A boy has sex with his teacher

When he gets home from school, his mother asks him,

"What did you do today in school?"

The child replies,

"I had sex with the teacher."

Furious, the mother scolds the boy and makes him go to his room.

"Wait until you're father gets here!" she exclaims.

An hour later, the father arrives home. Immediately he is informed of what his son did at school today by the mom. But instead of being outraged like his wife had been, the father praises his son.

"Son, you're growing into a real man. I think it's time to get you a bike."

So, the two go out and get the bike, and when they come home, the father asks,

"Son, do you want to try the bike now?"

"Not right now. My butt still hurts."