A woman walks into a tattoo parlor and asks 'Do you do custom work?'
'Why of course!'
'Good. I'd like a portrait of Robert Redford on the inside of my right thigh, and a portrait of Paul Newman on the inside of my left thigh.'
'No problem,' says the artist. 'Strip from the waist down and get up on the table.'
After two hours of hard work, the artist finishes. The woman sits up and examines the tattoos.
'That doesn't look like them!' she complains loudly.
'Oh yes it does,' the artist says indignantly, 'and I can prove it.' With that, he runs out of the shop and grabs the first man off the street he can find; it happens to be the town drunk.
'Well, what do you think?' the woman asks, spreading her legs. 'Do you know who these men are?'
The drunk studies the tattoos for a couple of minutes and says. 'I'm not sure who the guys on either side are, but the fellow in the middle is definitely Willie Nelson!'