Dad: Welcome.
Boy: Thanks. She is my girlfriend dad.
Dad: Oh yeah?
Boy: Yes, she is.
Girl: We get to go sir. For study. To my boyfriends room.
Dad: Okay, good luck.

1 hour later, dad hears noise like that Ohh Baby Baby Baby.

Dad: What the f**k? What the hells going on here!

Dad opens the door and...

Dad: Oh sorry, you are just having sex, I just thought you are listening Justin Bieber. C'mon go ahead.
Boy: Lol.
Girl: Lets continue to this darling.