"Longevity..." joke

One day an older fella was in for a checkup. After his examination, his
doctor was amazed.
"Holy cow! Mr. Edwards, I must say that you are in the greatest shape of
any 64 year old I have ever examined!"
"Did I say I was 64?"
"Well, no, did I read your chart wrong?"
"Damn straight you did! I'm 85!"
"85! Unbelievable! You would be in great shape if you were 25! How old
was your father when he died?"
"Did I say he was dead?"
"You mean..."
"Damn straight! He's 106 and going strong!"
"My Lord! What a healthy family you must come from! How long did your
grandfather live?"
"Did I say he was dead?"
"No! You can't mean..."
"Damn straight! He's 126, and getting married next week!"
"126! Truly amazing, Mr. Edwards. But gee, I wouldn't think a man would
want to get married at that age!"
"Did I say he wanted to get married?..."