Why do your fingers get wrinkly in the pool or bathtub?

Why do you get goosebumps when you're cold? Is your funny bone a bone? What other strange body quirks do you have? For free home activities sign-up at www.WhoSmarted.com See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.