A Frenchman, an American, and an Irishman are in a bar

A fly lands in the Frenchman's beer and he says "Gross! There is a fly in my beer, I will drink no more!" and he pushes it away.

A few moments go by and another fly lands in the American's beer. He fishes it out, flicks it away, says "It's just a fly, no big deal." and continues drinking it.

Several more minutes go by and yet another fly lands in the Irishman's beer. He suddenly jumps up, picks up the fly and angrily yells "SPIT IT OUT YE BASTARD!"