Late one Friday night the policeman spotted a man driving 
very erratically through the streets of Dublin. They pulled 
the man over and asked him if he had been drinking that 
evening.

"Aye, so I have. 'Tis Friday, you know, so me and the lads 
stopped by the pub where I had six or seven pints. And then 
there was something called "Happy Hour" and they served these 
mar-gar-itos which are quite good. I had four or five o' 
those. Then I had to drive me friend Mike home and O' course I 
had to go in for a couple of Guiness - couldn't be rude, ye 
know. Then I stopped on the way home to get another bottle for 
later .." And the man fumbled around in his coat until he 
located his bottle of whiskey, which he held up for 
inspection.

The officer sighed, and said, "Sir, I'm afraid I'll need you 
to step out of the car and take a breathalyzer test."

Indignantly, the man said, "Why? Don't ye believe me?!?"