I think it is just psychological, for the most part. I have a friend who I have seen in a string bikini that barely covered anything, and once in a bra that covered more than even some of her tank tops, and she freaked when I saw her bra, and her bra was completely lined and really boring.
Underwear can be different, though, since most underwear is a lot thinner than bikini bottoms, which are usually lined.
Similar: I shared a hotel room with a female friend and her husband once. She would prance around in a tank top and underwear before getting dressed, but once she put a skirt on, she would be extremely cautious about me seeing up her skirt, even though I just saw her in her underwear before/as she was putting her skirt on. So, she has no issues with me seeing her yellow underwear, but once her skirt was on, it changed everything.
|