A freind just told me this so I thought I'd pass it on...

Five old ladies are sitting on a bench outside of a retirement home, talking and laughing and complaining.

An old man walks by and one lady says,"I bet we could guess your age."
He says,"I bet you CAN'T!"
Another says,"Oh yes we can." and they all start laughing.

He gets really irritated and says,"Fine then. Guess my age."
One old lady says,"Drop your pants and underwear and we'll tell you."

He's so ticked off at them laughing at him, he does it.
Another old lady says,"Now turn around." and he does.

She yells,"You're Ninety-one years old!!"

He pulls his pants back up in amazement and says,"How did you figure that out?!"
And she says,"We went to your birthday party yesterday."