A man walks into a drug store with his 8-year old  son. They happen to walk 
by the condom display, and  the boy asks, "What are these, Dad?" To which the 
man matter-of-factly replies, "Those are called condoms, son. Men use them to 
have safe sex."

"Oh I see.", replied the boy pensively. "Yes, I've heard of that in health
class at school." He looks over the display and picks up a package of 3 and
asks, "Why are there 3 in this package?"

The dad replies, "Those are for high-school boys. One for Friday; one for
Saturday; and one for Sunday."

"Cool!" says the boy. He notices a 6-pack and asks, "Then who are these 
for?"

"Those are for college men.", the dad answers. "TWO for Friday; TWO for
Saturday; and TWO for Sunday."

"WOW!" exclaimed the boy. "Then who uses THESE?" he asks, picking up a
12-pack.

With a sigh, the dad replied, "Those are for married men. One for January; 
one for February; one for . . ."

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