African elephants' wrinkles help them keep cool. African elephants are also more wrinkled than their forest-dwelling Asian relatives. Both species have sparse body hair, and a 2012 study in PLOS ONE showed that these hairs also assist the giants in dissipating heat.

The loose skin of naked mole rats (pictured, an animal in South Africa) helps them burrow underground.

The sharpei (pictured) likely got wrinkles from selective breeding.

source: Nat Geo