Bar: Guy and a Picture of a Hottie

This guy, about 40, walks into a bar and orders a drink. Then he pulls out a picture of a beautiful girl, about 20. He orders drink after drink after drink. Finally, the bartender asks why he's getting drunk
"I have to come home to this!'' the guy says, pointing to the picture of the beautiful girl.
"What's wrong with her?'' asks the bartender. ''She's beautiful and half your age!''
''Exactly. That's my daughter.''