Ladies do you talc? I always talc my folds. I don't get infections, just sometimes in my belly button. When I was bigger I used to spray dove deodorant there and under my boobs. They used to get really sore.
I always talc too and am lucky so far not to get infections, but I have still got a long way to go which will mean saggier bits! If I get sore at all at the mo, I use sudocrem which does the trick, but talc generally works and keep the skin dry etc.