A girl posts pictures of themselves in bikinis, that's alright. A girl is seen in a bikini, awesome.
A girl is accidently caught in underwear? OMG so embarrassing! Or say she posts a picture of her in a bra? SLUT.
Can anyone tell me why this is? For the most part, they cover the same amount of skin
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I believe it's the context of the situation. I guess they think that underwear is something to be only seen in private, while swim suits are meant to be seen. I know it doesn't really make sense but it's the best theory I have.