At least she will have stylish pubes

Buy a safe, new curling iron, and maybe a new toothbrush and hairbrush. OP's sister needs a ***** or a boyfriend asap.

Give it to her as a present

oh shyt that's kinky

maybe she was trying to curl her pubes

What the **** is a curling iron?

I guess she uses it because it can be opened slightly, perhaps yielding more pleasure? Either way, that's really weird.

Then again, she might be using the heat to her advantage.

Or perhaps even separates it so that one part touches her ******** as the other part actually penetrates her.

Sorry, i accidently disliked your comment when i mean't to like it. Completely agree.