An Englishman, a Scotsman, and an Irishman went into a pub and each ordered a pint of Guinness. Just as the beers were served, by coincidence, a fly landed in each one.
The Englishman pushed the beer away and said "That's disgusting, I'm not drinking that."
The Scotsman plucked out the fly, flicked it away, and started drinking.
The Irishman grabbed the fly, held it by its back legs over the beer, and shook it, saying "Spit it out, you bastard!"