Joke In The Box

An elderly man and woman meet in a bar and get to talking.
They are enjoying their conversation so much that, when the
bar closes, they decide to continue at the woman's apartment.

After a time, things start getting pretty romantic and they
wind up in bed. Afterward, they're both laying there, staring
at the ceiling. 
The old man is thinking... "Gosh,if I had known she was a
virgin, I would have been more careful with her." 

The old lady is thinkin... "Geez, if I had known he could get
it up, I would have taken off my panties."
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