Two deaf people get married. During the first week of marriage, they 
find that they are unable to communicate in the bedroom when they turn 
off the lights.
After several nights of fumbling around and misunderstandings, the 
wife proposes a solution. "Honey," she signs, "Why don't we agree on 
some simple signals? For instance, at night, if you want to have sex 
with me, reach over and squeeze my left breast one time. If you don't 
want to have sex, reach over and squeeze my right breast one time."
The husband thinks this is a great idea and signs back to his wife, 
"Great idea! Now if you want to have sex with ME, reach over and pull on
 my penis one time. And if you don't want to have sex, reach over and 
pull on my penis... fifty times!"