A man and his girlfriend are having a sexual encounter. He asks
her to "go downtown" so, with a sigh, she gets on her knees in
front of him and starts peering at his genitals, looking and
tipping her head this way and that, studying the whole business.
After about five minutes of this, he asked her in a sort of
peeved voice, "Well, what are you doing?"
She said "I'm doing what I always do when I'm downtown with no
money - 'just looking'."