Three guys out for a hillwalk a Corkman, a Kerryman, and a Dub. Cork guy sees a strange looking bottle and picks it up and out pops a genie who says "I shall grant you three wishes". Cork man is sound, of course, so he says, look I'll take one wish and give one wish each to my two companions.
First up the Kerryman asks how much will it cost but when he hears its free he says "I want Kerry to win the next three All Ireland Senior Football Championships by at least 5 goals in each final".
"No problem" says the genie "consider it done".
Next up is the Dub. "I'm sick and tired of bleedin culchies coming up and taking over my city. I want you to build a high wall all around Dublin and anybody who isn't a dub be thrown outside of the wall".
"No problem" says the gennie "consider it done"
"What about you" asks the genie of the Corkman "what is it you wish for?"
The Corkman thinks for a while and says "Look I'm from Cork, I've been blessed in life, I'm not sure what it is I'd like in life that I don't have already".
Then he has an idea and says to the genie "Tell me about that wall you're doing for the dub"
"Well it's 10 feet tall, 3 feet thick, and nothing can get in or out of it"
"Perfect" says the Corkman.....
"Fill it with water!"