dad explaines condoms

A FATHER and his young son were in the chemist shop when they walked past a rack of condoms. “What are those things, daddy?” asked the kid.
“They’re condoms. You use them when you’re having sex,” replied the father.
“Why do they come in packs of one, three and 12?” asked the kid.
“When you’re in high school you buy the single pack for when you get lucky on Saturday night,” explained the father. “And when you’re a young man you buy a triple pack so you can do it three times a week with your girlfriend.”
“What about the 12 pack, daddy?” asked the kid.
“Those are for when you’re a married man,” said the father. “One for January, one for February, one for March…”