Some ways to handle dealing with the Crabby Old Fart at FK

[The Wizard of BC]

Na, it's not that we can't tell what's funny, it's that by the time your my age you've heard that joke so many times it's not funny any more.

A guy walks into a bar. The first thing he notices is that everyone at the bar has a duck on his head.
So he says to the bartender, "Oh no, not another one of those funny bars. Isn't there anywhere left where a guy can just sit and enjoy his drink?"

[Canuck]

Na, it's that by the time your my age your not funny any more.

Yep! and your old!