Perfume stops sweating, but not necessarily the smell. It’s just those little molecules that stop sweat from coming out of your pores. There are some commercial deodorants that can mask or cover up odors as well as perfume does, but they’re expensive and if you don’t use them consistently it doesn’t work very well. They also aren’t completely natural — many contain aluminum — which is a terrible thing to put on your skin (source). For the best deodorant for men and women who want to avoid all artificial ingredients and chemicals: make your own! You can pick up a DIY book like How to Make Your Own Deodorant at Amazon here.