An old man in a nursing home was celebrating his 83rd birthday. One of the female residents stopped by his room to say hi.
"how are you doing today?" she asked.
"I'm celebrating my birthday, today," the man told the woman,"guess how old I am."
"drop your pants and let me feel your balls," she said.
The old man looked around and decided no one was watching, so he did as the woman said, and she began to feel his balls with her hand.
"you're 83," she said.
"how did you know?" the old man replied.
"you told me yesterday."