Still unimpressed the bartender pours some 6-year old scotch. The patron takes a sip...same reaction. But the bartender still doesn't believe the patron knows the difference. So he pours a shot of 10-year old scotch. Again, the same reaction from the patron.

Finally, the bartender is convinced. He pours the patron a glass of 12-year old scotch. The patron takes a sip and is most satisfied. All the while this has been going on, a drunk at the end of the bar has been watching. He slides a shot glass down the bar to the patron and drunkedly says: "Shay mishter, tashte this!"

The patron obliges...he promptly spits it out. "It tastes like piss,"
he shoots back at the drunk.