There was this really old guy at an old timer's dance who hadn't had any
 sex for a long time. He'd been dancing with all the Grandmas all night
 and still hadn't scored.
  Frustrated, he approached an old woman and said, "I'm having no luck
 scoring with a woman. How about coming back to my place for some sex.
 I'll give you 20 bucks."

  She said "I'm willing. Let's go!"
  They got back to his place and after a bit of foreplay, they headed
 for the bedroom.
  He loved the sex and couldn't get over how tight she was for such an
 old woman. He swore to himself that she had to be a virgin.
  After the wonderful performance, he rolled off of her and said,
 "Wow,Lady...If I had known you were a virgin, I would have given you
50  bucks."
  Surprised, she said "If I had known you were actually going to get an
 erection, I would have taken off my pantyhose!"