A man in his eighties goes to see his GP.
"What seems to be the problem?" asks the GP.
"Doctor, I can only manage being intimate with my wife once a week" says the man.
"You're 85. Once a week isn't bad at all. What were you expecting?"
"Well, there's a bloke down the pub who tells everyone that he can do it twice a day, and he has my age"
"Why don't you do the same then?" responds the GP.
"Do you mean that I should ask him how he does it?" asks the man.
"No, I mean why don't you also tell everyone that you can do it twice a day...?"