Men do use dry shampoo. It's a quick and easy way to freshen up oily hair without doing a full wash. It's especially useful for touching up after a long day at the office or gym session before heading out for the evening. The application is super simple. All you need to do is to spray it close to the roots, then give it a good brush. Just remember, however, that it is still a shampoo, so doing it too often can dry your hair out and can create a build-up on your scalp.