So when Paddy's, 18th birthday came 'round, he and his pal Mick, took a boat out to the middle of the lake, Paddy, stepped out of the boat ...and nearly drowned! Mick just barely managed to pull him to safety.
Furious and confused, Paddy, went to see his grandmother. 'Grandma,' he asked, "It's my 18th birthday, so why can't I walk 'cross the lake like my father, his father, and his father before him?"
Granny looked deeply into Paddy's, troubled brown eyes and said, "Because your father, your grandfather and your great grandfather were all born in December, when the lake is frozen, and you were born in August, ya f*ckin dip shit.