Three mischievous old women were sitting on a bench outside a nursing home when an old man named Jim walked by.
One of the old women yelled out saying, "We bet we can tell exactly how old you are."
Jim said, "There is no way you can guess my age, you old fools."
One of the old women said, "Sure we can! Just drop your trousers and your underpants and we can tell your exact age."
Embarrassed , but anxious to prove they couldn't do it, Jim dropped his trousers and underpants.
The Grandmas asked him to turn around a couple of times and to jump up and down several times.
A few minutes later the three old women piped up and said, "You're 87 years old!"
Standing with his pants down around his ankles, old Jim was astounded and asked, "How in the world did you guess?"
Slapping their knees and grinning from ear to ear, the three old ladies happily yelled in unison,