"If you're so inclined, you can clean the grossest parts of your body with a soapy washcloth or cleansing towelette to remove odor-causing bacteria on non-shower days."
Hey! That's what I've been doing! Good for me.
Besides being better for your skin, showering less is also environmentally sound. You use less water and don't expend natural resources heating it.
Take a good whiff of yourself. Don't you smell smart?