Congratulations! You picked up on the setup line.
Is Brad Pitt known for being "dirty"? If so,is that "I'm afraid of soap and water" dirty,or is it "Hollywood" dirty?
I don't remember where I heard this, but my understanding is that Brad is kinda, uh, stinky. Too much reading in the supermarket check out line, no doubt.
Of course, that contrived "manly" unwashed stubbly thing just doesn't do it for me.
The real thing now........