Stop me if you heard this one: two Irishmen walk out of a bar.
No really, it could happen!
How ‘bout this one: A baby seal walks into a club.
Real story:
There’s bar in Shannon Ireland called Durty Nellie’s. After a few too many, the joke telling starts. Two Brits lead the pack. After a time, a hod carrier sized Irishman steps between them, puts his hands on their shoulders, and says “What’s black and blue and floats face down in the Irish Sea?” He then answered his own question: “Englishmen who tell Irish jokes in Irish pubs”. They both fell silent, finished their Stouts, and left quietly. The joke telling continued.