I used the magic shaving powder (sensitive skin w/ aloe version) for the first time last week on my chest and abs (I'm not hairy, but have some light hair in these areas); left it on for 7 minutes. Literally, burned the shit out of my nipples -- they are just recovering now. I originally thought I'd use it down below, but after that, I don't think so... Maybe arms and legs, but nowhere sensitive... As an aside, didn't work all the great either...