A guy walks into a bar and announces that he can close his eyes and name what kind of alcohol he is drinking and how old it is, just by taste and smell.
A drunken guy at the bar says, "I bet I can give you a drink that you can't name."
"You're on," replies the guy, "as long as you pay."
So the drunken guy puts a drink on the table. The guy sips it, gags and spits it out. "This tastes like piss!"
"Yeah," says the drunken guy, "now guess how old I am."