Next time you brew yourself a cup of joe, keep the grinds and fight loose, droopy skin on your derriere. As we age, the body produces less collagen and elastin, resulting in thinner, drier skin. Coffee grinds are the main ingredient in this fanny facial; caffeine constricts blood vessels to make skin look tighter. Salt is an excellent exfoliant and skin brightener. Honey and olive oil work to hydrate and soften the skin.