A woman posts an ad in the news paper that looks like this...

Looking for man with these qualifications:
- won't beat me up
- won't run away from
- is great in bed.

She got lots of phone calls replying to her ad but met someone perfect at her door one day.
The man she met said, "Hi, I'm Bob. I have no arms so I won't beat you up and no legs so I won't run away."
So the lady says, "What makes you think you are great in bed?"
Bob replies, "I rang the door bell didn't I?"