One day an English mason, a Scottish mason, and an Irish mason were in the bar after the meeting.
They each proceeded to buy a pint of Guinness.
Just as they were about to enjoy their creamy beverage, a fly landed in each of their pints and became stuck in the thick head.
The Englishman pushed his beer from him in disgust.
The Irishman fished the offending fly out of his beer and continued drinking it as if nothing had happened.
The Scotsman picked the fly out of his drink, held it out over the beer and yelled
“SPIT IT OUT!! SPIT IT OUT!!!!”