This is an old one and I don't know if it's been told yet....
A guy can't seem to keep a date, but all his friends seem to be keeping their's. So one day two of his friends say he can come along on their double date, and catch a few pointers. So he decides to go, and brings a new date. Well they sit down to eat and the first guy says to his girl "Pass the sugar, Sug' *

*" and she giggles. Then the next guy says "Pass the honey, Hon' *

*", and she giggles. So apparently the guy catches on, and then says "Pass the pork, Pig *

*"