How old were you when you started wearing thongs and lace underwear?

Nicole
I'm 15 turning 16 and in the girls locker room there's always girls walking around in their bras and underwear and there wearing a thing or lace and I don't wear that and I was just wondering when I should like so many girls I know wear that stuff and I want to but I'm scared to ask my mom because what if she thinks I'm to young like I don't know when I should ask should I wait till I'm 16 like I don't know.