I really don't think it matters what they wear. They are wearing those clothes to please themselves. If they wanna wear size S, then do it, if they wanna wear M or L then it is their choice. Just like people make their own choices to wear whatever shoes,hats,shirts, even how they do their hair. If i like it myself, then im gonna do it for myself, i won't care what other people think (i most likely don't know you and won't see you ever again anyways lol). That's just what I think about this. Oh and the pictures that Viv posted, i think the first 2 are okay because their girl parts aren't hanging out, and the 3rd picture yeah is a bit...over.....if she wants to show some skin sure why not, but don't wearing something that allows other people to basically almost see your girlie parts lol.