I just got home from a day wedding, and had to comment on this subject. There was one lady who looked to be in her late 30s and was wearing a cute pink skirt with a pink bra and tight white tank top. It was actually a cute outfit, but the temperature in the hotel was very chilly and her nipples were definatly making their debut. I am sure other people noticed. Even though she was wearing a bra, they were quite noticable as my husband even made a comment. But she seemed quite comfortable with it as she made no effort to cover them or hide them, and I thought that was perfectly ok. It is true, nipples can be stimulated by either becoming aroused, chilly, or the feel of certain fabrics against your skin, and that it should not always be considered sexual. Just my thoughts.