You get what you want

A girl posted an advertisement in the paper for a husband, saying: 'I need a person who will never leave me, never beat me and can satisfy me in bed.' Next day, a guy with no arms and legs knocked loudly at her door. Girl:who are you? Guy: I want to be your husband. Girl:you don't fit for that. Guy:I don't have arms, so I can't beat u. I don't have legs, so I can't leave you. Girl: But how can you satisfy me in bed? Guy:How do you think I knocked the door?