Oh to be Irish

Paddy had long heard the stories of an amazing family tradition.

His father, grandfather and great-grandfather, had all been able to
walk on water on their 21st birthday.

On that special day, they'd each walked across the lake to the bar on
the far side for their first legal drink.

So when Paddy's 21st birthday came a round, he and his pal Murphy,
took a boat out to the middle of the lake; Paddy stepped out of the
boat...... and nearly drowned!
Murphy just barely managed to pull him to safety.

Furious and confused, Paddy went to see his grandmother.
He asked, "It's my 21st birthday, so why can't I walk across the lake
like my pappy, his pappy, and his pappy before him?"

Granny looked deeply into Paddy's troubled eyes and said,
"Because your father, grandfather, and your great-grandfather were
born in January when the lake is frozen, and you were born in July you
dumb ass."