Ladies- when did you first discover that your nipples were an erotic hot zone?

And how did you make this discovery- by yourself or with a playmate?

I discovered it all on my own while masturbating. I've been so horny all day that I'm playing with my nipples right now.

I was aware as a pre-teen, that it was a special feeling, but mutual explorations with my bff made it a bit of an obsession.

Since I had my girls, they've become so much more sensitive, breast fed them both, if I'm home alone or having 'me time' I do find myself playing with them, sometimes without thinking, the combination of 'me time' and gently playing with them really increases the feelings and intensity when I climax.

At my early teens, when my breasts grow up.