Two mischievous old grannies were sitting on a bench outside a nursing home when an old man walked by.
One of the old grandmas yelled out: “We bet we can tell exactly how old you are.”
“There is no way you could guess that, you old fools,” the old man replied.
The other old grandma said: “Sure we can! Just drop your pants and under shorts and we can tell your exact age.”
Embarrassed just a little, but anxious to prove they couldn’t do it, he dropped his drawers.
The grandmas asked him to first turn around a couple of times and to jump up and down several times.
Then they both piped up and said: “You’re 87 years old!”
Standing with his pants down around his ankles, the old gent asked: “How in the world did you guess?”
Slapping their knees and grinning from ear to ear, the two old ladies happily yelled in unison: “We were at your birthday party yesterday!”