Part of that is because my head is a worst-case frizz scenario of partially my own making. But the larger issue might be that topical cosmetic treatments of any kind are imperfect fixes for the ways that human bodies naturally deviate from arbitrary beauty standards. There’s no fancy goo you can put in your hair on a humid day that will be as effective as simply refusing to worry about it. That’s Witherspoon’s approach: “I like to tell my clients to not be afraid of a little frizz.”