A 78 year-old man came into the Doctor's office and complained of being tired. The Doctor asked if he'd done anything unusual lately. The man said, "Well,.... Wednesday night I picked up a 20 year old secretary, went back to her place, and nailed her 3 times. Thursday,.. I met a 19 year old waitress at the diner and we went out to Lover's Rock and made love 4 times. Friday,.. I went out with an 18 year old friend of my granddaughter's and we ended up making it in the back of my Ford. Saturday I was lured into a motel by 17 year old twins..." The Doctor said, "That's absolutely astonishing. But with all the dangers of sex these days, I hope you took the proper precautions..." "Why of course," the old geezer replied, "I gave 'em all phony names..."