Egg Timer
 

She was in the kitchen doing the boiled eggs for breakfast.

He walks in.

She says, "You've got to make love to me -- this very moment."

He thinks, "This is my lucky day", and gives it his all on the kitchen table.

He says afterwards, "What was that all about?"

She says, "The egg timer's broken.

Yeah, quickies are much more common after you've been together a while. How long does it take to boil an egg? 10 minutes? I try to at least stretch it out to 15.