A few years ago, the FDA approved an over-the-counter topical spray specifically for helping sex last longer for men. The active ingredient is lidocaine, which is the same stuff doctors use for local anesthesia? And apparently, it works. But the right amount of use varies from person to person, and will probably require a certain amount of trial and error, just as with numbing creams. In fact, one danger of the numbing spray is that it can work so well (particularly if the man also uses a condom) that sex begins to feel like a chore, which is hardly great for your relationship. Many men will find it ultimately more satisfying to use too little of this stuff than too much of it.