A guy comes into a bar. He sits at the bar, and orders a beer. As the barteder fixes it, the guy looks around and sees a big cucumber-glass, filled with five-dollar bills, a sign on it: "The Dare". He gets his beer and says to the bartender, pointing at the glass full of money: "What's that about?"
"We got a dare-game here in the bar. Everyone who wants to give it a shot puts in a fiver and then has to proceed and master three challenges. Who makes it through wins the whole glass with the cash."
The guy rubs his chin. He's a little short on money, but the five bucks would not hurt him, and so he says: "Well, I am taking you up on this. Here's my fiver, what are the challenges?"
After the bill has joined the other in the big glass, the bartender says: "First, you will drain a pint of whisky in one go. Second, my pitbull in the back has a bad tooth, you have to pull it. Third, my 90-year-old granny lost her husband three years ago and she is horny as hell. You have to fuck her 'til she cums."
"I'll be damned.", says the guy, "Fill up the pint!"
He has a hard time, his eyes water, snot runs from his nose, but he wills the pint down.
He stumbles into the backyard and for some ten minutes, there are terrifying wails, yowls, and feverish barking.
The bartender almost believed he would not see that guy again... but - his clothes in rags, scratches all over, the man tumbles back into the bar.
Panting, he leans across the bar, and grabs the bartenders collar:
"And now gimme those pliers so I can pull your grannies bad tooth!!!"