Little Johnny and his father went into a drug store to pick up a prescription. While there, little Johnny looked around and saw a large display for condoms.

He looked at all the brightly colored packages, different types and quantities. The little boy went to his father and asked "Daddy, what are these condoms?"

The father said, "Well, they are for protection from diseases when a man and a woman make love."

The little Johnny contemplated the concept for a few moments and then asked "Then why do these come in a package of three?"

"Those are for young men in high school. One for Friday night, one for Saturday night and one for Sunday afternoon."

"UH-HUH" said the little Johnny, "then why are these in packages of six?"

"Those are for young men in college. There are two for Friday night, two for Saturday night and two for Sunday afternoon."

"WOW" said the little Johnny in amazement. "Then why are these packaged a dozen at a time?"

The father answered "Those are for married men. One for January, one for February..."