Birthday Celebration

"Look at ME!!" boasted the fit old man, pounding a very flat and firm stomach, having just finished 100 situps before a group of young people.

"Fit as a fiddle! And you want to know why? I don't smoke, I don't drink, I don't stay up late, and I don't chase after loose women!!"

He smiled at them, teeth white, eyes aglitter, "And tomorrow -- tomorrow, I'm going to celebrate my -90th- birthday!!"

"Oh, really?" drawled one of the young onlookers, "How?"