I had a woman mention once that she liked wearing sexy underwear because it made her feel more feminine. "But not to work," I said naively. "Oh yes, very much so!" she replied, "It makes me feel better in uniform."
I should mention that: (1) the woman was my boss; (2) it was a work day and we were both in uniform; (3) this was 1985 and the concept of "conversations unsuitable for the workplace" had not been put in place yet; (4) the conversation terminated shortly thereafter.