A dude walks into a bar and says to the bartender : "I want a

A dude walks into a bar and says to the bartender :
"i want a 12 years old scotch,
And don't try to fool me because i can tell the difference."

The bartender is sceptical
And decides to try to trick the man with a 5 year old scotch.

The man takes a sip, scowls and says :
"hey - bartender, this crap is 5 years old scotch.
I told you that i wanted a 12 years old."
The bartender won't give
And tries once more this time with a 8 year scotch.

The man takes a sip, grimaces and says :
"bartender, i do not want 8 years old scotch like this filth.
Gi'me a 12-years old scotch or ill leave !"

Impressed, the bartender gives him the 12-year scotch on the house,
The man takes a sip and sighs,
" ah, now that's the real thing. "

A disgusting, ugly, grimy, stinking drunk
Has been watching all this with great interest.
He stumbles over and sets a glass down in front of the man and says. :
"hey, i think that's really far out what you can do. try this one."...

The man takes a sip
And immediately spits out the liquid and cries,
"yechhh! this stuff tastes like piss!"

The drunk's eyes light up and he says,
"yeah sure, now how old am i ?"