Three old ornery 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 how old you are."
The old man said, "There ain't no way you can guess it."
One of the ornery grandmas said, "Sure we can! Just drop your under shorts and we can tell your exact age."
So, 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!"
The old man was stunned. "Amazing! How in the world did you guess that?"
The ornery old grandmas, laughed. Slapping their knees and grinning from ear to ear, all three happily yelled in unison, "Because you told us yesterday".
