You raise a good point about antiperspirants. The various forms of aluminum salts used as active ingredients in antiperspirants actively block the pores of your skin, to prevent sweating, but stain the cotton of your undershirt (and current research indicates it might have be having an effect on our bodies, as well). Whereas we might argue that many men and women get a bit ripe due to hair, sweat, and body heat, if you don't sweat excessively under your arms, then the antiperspirant isn't necessary. A good deodorant should take care of any smell and the undershirt is there to catch the sweat. We might need to reconsider our stand on this. Thanks for the email.

http://www.deliciousorganics.com/Controversies/antiperspirant.htm

http://home.howstuffworks.com/question627.htm

http://www.fda.gov/fdac/features/2005/405_sweat.html