When I was in my teens I was mortified by the thought that someone might notice I had nipples. I alwaysalwaysalways wore a padded bra. I wore strapless bras under my tank tops. My mother, the hippie, could never understand it. She was always trying to get me to go without (both bra and panties!). She seemed to think it was healthier, all about the air-flow ya know. That's why I prefer cotton undergarments too. I was always lectured about how natural fabrics were better for you because they breathed (which is true). I can honestly say though, after nursing three kids, that I don't give a rat's arse if someone notices I have nipples. Everyone has nipples. If they can't deal with it - that's their problem!