Yes, it's a good idea to use some type of shaving cream with warm water when shaving in order to avoid irritating the skin and for a smoother shave.
you don't have to. Men should for their faces. For women you can use soap of even hair conditioner!
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Yes, but only the womens kind. Try Dove soap instead. It moisturises the skin, minimizing razor bumps.
it is not "bad for you" but shaving cream makes your hair stand up so it shaves easier, also if you don't use shaving cream it will cause more cuts and if you use shaving cream it moisturizes your...