After skimming this thread:
http://boards.straightdope.com/sdmb/showthread.php?threadid=111154
I wondered if people had to wash their jeans, etc., more often because of their generals 
being so close to the fabric of their clothes. It seems that the answer would be yes. Esp. during hot weather. I thought the purpose of underwear was to avoid having to wash outer clothes as often.
I change clothes at least on a daily basis, but I’d do that even if I wore steel long johns under my pants. I just grew up with the attitude that anything that was worn once was dirty. Besides, I live in Texas, and sweat is what affects the freshness of clothes around here.
When I’m going out in public to school or something, I wear fresh clothes every day. When I’m just hanging out with friends, I can be seen to wear clothes twice, or even three times between washings. When I’m just being lazy at home…I wear a pair of clothes until it either stops flexing and I have to have it cut off with the jaws of life, or it becomes too stinky for even I to stand. Over a week, with regularity:)