A man walks into a bar...

...And sees a jar full of $10 bills on the counter. "What's that for?" he asks the bartender. The guy behind the counter replies: "We have a contest going on, to take part you gotta drop $10 in the jar. You then drink a shot of tequila, and go outside in the back. There's a huge Rottweiler with a rotten tooth and you gotta remove it with pliers. Then on the third floor of the building, there's an 80-year old lady that lives there and she never had sex. Give her the night of her life. If you can do those three things, you earned all that's in the pot." The man ponders a bit, then says: "No, that's a bit too much for me. Give me some booze."

A bit later in the night, after half a dozen beers, the man finds himself staring at the jar full of money. He hobbles over to the counter and slaps a 10$ note on it. "A'ight, gimme some tequila!" He gulps the contents of it in a shot and whacks the glass on the counter. "Where's that mutt?" he asks again. "Through the back door, take a left", the bartender replies. The man goes outside. For a good five to ten minutes, everyone in the bar can loudly hear the sound of a whining dog coming from the back. "ARF, ARF, YOW! ARF! ARF!" A long silence then surrounds the place, and the man waddles back in with a blank face. He then asks: "Now where's that old lady with a rotten tooth?"