An 18-year old boy and his girlfriend are going camping for the weekend and plan to lose their virginity to each other

Bursting with excitement, the boy walks into a drug store to buy some condoms. He notices they come in packs of 3, 6, and 12.

He's a bit confused, so he calls the clerk over, and asks “Excuse me sir, but why are the condoms packaged this way?”

The kindly old clerk replies, with a sly grin, "Well, son, it's all about efficiency and practicality. You see, this pack of 3 is for teenage boys, like yourself. You have one for Friday night, one for Saturday night, and one for Sunday night."

“Oh, I see” says the boy. He points to a 6 pack and asks, “Then, who are these for?”

“Those are for college men,” the clerk answers. “TWO for Friday, TWO for Saturday, and TWO for Sunday!”

“WOW!” exclaimed the boy, “Then, who uses THESE?” he asks, pointing to the 12-pack.

The clerk sighed and replied, “Well, those are for married men, like myself. One for January, one for February, one for March……. ”