Do wrinkled fingers help us grip?

"Wet fingers and toes eventually wrinkle, and this is commonly attributed by lay opinion to local osmotic reactions. However, nearly a century ago surgeons observed that no wrinkling occurs if a nerve to the finger has been cut. Here we provide evidence that, rather than being an accidental side effect of wetness, wet-induced wrinkles have been selected to enhance grip in wet conditions." — From "Are Wet-Induced Wrinkled Fingers Primate Rain Treads?," a recently-published paper co-authored by Mark Changizi.