Smart Deaf Guy

A deaf couple are on their honeymoon. The husband asks the wife in sign language "Honey, how would I tell you when I want to have sex?".

The wife replies in sign language, "if you want have sex, bite my right nipple once; if you don't want to have sex, bite my left nipple twice".

Agreeing with this, the wife asks the same question to the husband.

The husband replies "Honey, if you want to have sex, pull my penis once; if you don't want to have sex, pull my penis 50 times".