One night a guy takes his girlfriend home from a date.  As they’re about to kiss goodnight at the door, the guy starts feeling a little frisky.

With an air of confidence, he leans with his hand against the wall, and, smiling, he says, “Honey, would you have sex with me?”

Horrified, she replies, “Are you mad?  My parents will see us!”

“Oh come on!  Who’s gonna see us at this hour?” he asks, grinning at her.

“No, please. Can you imagine if we get caught?”

“Oh come on!  There’s nobody around, they’re all sleeping!”

“No way.  It’s just too risky!”

“Oh please, please, I love you so much!”

“No, no, and no.  I love you too, but I just can’t!”

“Oh, yes you can.  Please?”

“No, no.  I just can’t!”

“I’m begging you.”

Out of the blue, the light on the stairs goes on, and the girl’s older sister shows up in her pajamas, disheveled hair, and in a sleepy voice, says,

“Dad says to go ahead and have sex with him, or I can do it… or if need be,

Mom says she can come down herself and do it.  But for heaven’s sake, tell him to take his hand off the intercom!”