Ok I have rather large tatas (42G), and if you're like me you get hot (thanks to pregnancy), start to sweat, and get itchy under your tatas :-( .
I kept seeing something at walmart and thought it looked funny as heck, but finally bought it because nothing was helping! I tried baby powder, tissues, talc, antiperspirant, ugh it would sometimes help the moisture issue, but not the itch :-(.
I'm not joking it's called "Lady Anti Monkey Butt".