Mischievous Grandma's

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