Two deaf people get married and during the first week of marriage they find that they are unable to communicate in the bedroom with the lights out since they can't see each other signing, or read lips. 

After several nights of fumbling around and many misunderstandings, the wife figures out a solution. 

She writes:

'Honey, 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 two times.' 

The husband thinks this is a great idea. He writes back to his wife if she wants to have sex with him, reach over and pull on his penis one time. 

If she doesn't want to have sex,
pull on his penis two hundred and fifty times.