Piano Player at a bar

A bar manager decides to put out a call for a piano player. A couple of days later, the bar receives a visit from a promising candidate. The man sits down at the piano and begins to play a rather enjoyable tune the manager is not familiar with.
When asked about the song, the piano player replies, "Wrote that one myself. I call it, 'Indecent Exposure'. The bar manager is a bit taken aback by the title, but he enjoyed the song nonetheless. He asks the man to play some more. The piano player runs through several other songs, all of which he composed: "Go Screw Yourself", "Doing Her Doggystyle", etc. Each song has a more obscene title than the last, but the manager is impressed with his ability and tells him that he can play as long as he doesn't tell people the name of his songs.

So he hires the piano player, and one night during a performance, the piano player gets up to use the restroom.
As he finishes and goes to return to his piano, a woman approaches him and says, sheepishly, "Excuse me, do you know your fly is open?"

The piano player smiles and exclaims, "Know it? Hell, I wrote it!"