Condoms

This young guy who was quite inexperienced went nervously into a pharmacy. He 
kinda hung around the back of the store, looking sort of "obvious" to the druggist. 
Anyway, seeing that the boy was nervous about buying condoms, the druggist asked if 
he needed any help. The boy asked what the difference is between the 3,6 and 12 packs.

The pharmacist proceeded to explain that the 3-pack is for your typical action-packed 
night, and that the 6-pack should be adequate for a long weekend...etc. The boy then 
asked,"but what are the 12-packs for?" 

The pharmacist replied," Oh they're for when you get married... You know, one for January, 
one for February, one for......."