If you're wearing well fitted clothes then regular panties give a visible pantyline which is not cool. So a thong or a g-string is really the only way to go. And once you get used to them they aren't uncomfortable. Plus I fell sexy when I'm wearing one.
So people can't see your panty line through your pants
a lot of girls wear them to hide the panty lines. but more commonly than not, girls wear them because they feel sexy in them. if a girl feels sexy in something, she tends to feel confident and is not afraid to be herself around people, new or lifelong. whenever I wear one I feel a lot more confident and sexy. plus they're really comfortable. not what the stereotype claims them to be.