A father and his son go into the grocery store when they happen upon the condom aisle. The son asks his father why there are so many different boxes of condoms.

The father replies, ''well, you see that 3 pack? You'll need that when you're in high school. You'll have 2 for Friday night and 1 for Saturday night."

The son then asks his father, ''what's the 6 pack for?"

The father replies, ''well, you'll need the 6 pack when you're in college. You'll have 2 for Friday night, 2 for Saturday night, and 2 for Sunday morning."

''Well then," replies the son, ''what the heck would anyone ever do with a 12 pack?"

The father answers, ''That's for married folks, son. You'll need 1 for January, 1 for February..."