Three Mischievous Grandmas

Three mischievous grandmas were sitting on a bench outside a nursing
home. About then an old grandpa walked by, and one of the old
grandmas yelled out saying, "We bet we can tell exactly how old you
are."
The old man said, "There ain't no way you can guess it, you
old fools."
One of the old grandmas said, "Sure we can! Just drop your
under shorts and we can tell your exact age."
Embarrassed just a little, he dropped his drawers.
The grandmas stared at him for a while, asked him to turn
around a couple of
times, asked him to jump up and down for a little while and
then they all piped up and said, "You're 84 years old!"
"How in the world did you guess??"
The old grandmas snickered and laughed. Slapping their knees
and grinning from ear to ear, all three happily yelled in
unison,
"Because we were at your birthday party yesterday!!! !"
[}:)][:0][:D]