A widow published an ad in the paper saying the following:
Rich widow is looking for a man in order to share life and fortune. The conditions are the following:
-He must not hit me.
-He must not run away.
-He must be good in bed.
During months, the phone and the doorbell rang, she got thousands of letters, but nobody seemed to have the three conditions. One day, the doorbell rang once more. She opened the door and saw a man with no arms and no legs. Astonished, she asked: "Who are you? And what do you want?". He said: "Hello. Your research has just finished. I'm the man of your dreams. I've got no arms, so I couldn't possibly hit you. I've got no legs, so I can't run away." She said, "And what makes you think you're so good in bed?". "Well, I rang the bell, didn't I?"