This was a story related to me by a medical practioner when an elderly man in his late 70s' came to him for medical checkup. The old chap asked the doctor, "Doc, is it healthy for a man of my age to have sex?". The doctor was slightly taken aback but put up a brave face and say that it is ok if the old man can still have an erection. The old man continues, "Well I can do five times a week to keep my young wife satisfied".
The doctor was really impressed and immediately asked, "How do you manage to achieve that?".
Old man replied with his right hand raised and start to count his fingers - starting Monday with the thumb and ending Friday with the little finger. My wife always complain that Friday seems less arousing as the finger is too short and not that finger licking good.
Saturdays & Sundays are my off days.