Okay, I'm all for shaming deodorant between legitimate fat rolls, but I have a BMI of 19.5 (5'8", 128 pounds), I'm a 32DD, and I put deodorant between and under my breasts because I sweat there. My breasts and my armpits are the only places on my body where skin-on-skin contact happens. It's not for the smell; it's because I don't want my bra to end up with sweat stains.