A young boy comes home from school and his mother says,
"What did you do today?"

The boy replies, "oh the usual. I got an "A" in spelling
and I had sex with my English teacher."

His mother, aghast, doesn't know what to do. She says
angrily, "Go in and tell your father what you just told me!"

The boy goes to his father and says, "Gee, mom sure is mad."

The father says, "Why now?"

"I think she's mad because I had sex with my English teacher."

The father is beside himself with joy. He gives his son a
nudge and a wink and says, "Congratulations son! I'll tell
you what-let's go out and celebrate. We'll have some ice cream
and then I'll buy you a new bike."

The boy says, "The ice cream sounds great, but can we hold
off on the bike? My ass is killing me."