Ugly Guy gets all the Girls

[Old Guy]

So there's this one guy who sits in the bar most of the night all by himself, he's got facial scars, moles, and just a downright not so good looking dude. But he always goes home with some sweet looking chick tagging along on his arm.
The other guys can't figure out his secret. They are all good looking, got new pick up trucks, clean, etc., etc. Finally one night Jimmy Joe gets lucky with one of the sweeties he's seen go home with the ugly dude. After a romp Jimmy Joe finally asks this chick what attracted her to Mr. Ugly. "Well, he has nice eyebrows. He keeps them nice by licking them."

[Lost Sheep]

I heard this joke with a slightly different construction. But I like the punch line in the one I heard better.

Guy observes ugly guy nursing a beer several days/weeks and the ugly guy keeps getting approached by lovely women, leaves with them and comes back later and gets a fresh beer.

This happens repeatedly.

Finally the observer asks the bartender about this curious sequence of events.

Bartender, "I don't know. I can't figure it out either. He just sits there day after day, licking his eyebrows."

The attractiveness of his eyebrows is really a nice touch. I can't yet figure out how to incorporate into my version yet.

[Old Guy]

Yea what you wrote was the original, the bartender gave the answer.
I like to make things up!