Just Married Couple

A just-married couple's on a plane on the way to their honeymoon.

The wife turns to her new husband and says, "Honey, how will I let you know at night when I want to have sex?"

He says, "Simple. Any night you want to have sex, reach over and tug on my dick. And any night you don't want to have sex, tug on it about three hundred and fifty times."