Advertisement: Anyone who thinks moisturizers are not important for beautiful skin should consider what happens to the earth, the skin of the world, in time of drought  Without regular infusions of moisture the ground becomes lined and cracked and its lush liveliness fades away
Thus your skin, too, should be protected from the ravages caused by lack of moisture; give it the protection provided by regular infusions of Dewyfresh, the drought-defying moisturizer
It relies on an analogy between two things that are insufficiently alike in the respects in which they would have to be alike for the conclusion to be supported.