Mom gets call from school, son gets caught having sex on campus, mom is furious.
Mom tells dad about son when Dad comes home from work, dad pretends to be upset. :-) (really dad is proud!)
Next day Dad is home when son gets back from school.
He says: Well son did you have sex today?
Son says:
"No Dad, My ass still hurts from yesterday!
Cheers!,
BV