Toddler will not stop touching nipples and belly button

So the title gives away my issue here.

My toddler will not stop touching her nipples and belly button. I'm assuming it's kinda nice to do so and perhaps also just a way to keep her fingers busy.

But it's driving me nuts. I do not know how to deal with it. I've tried finding other things to fidget with, but it's not helping.

Any advice is appreciated!