Abnormal paw growths, like tumors, trigger paw licking in dogs. The top two tumors of the paw are plasmocytoma andhistiocytoma. Plasmocytomas are widespread in seniors and histiocytomas in puppies and young adult dogs. Both tumors are benign and look like solitary, hairless, and pink masses...
The second theory is that we lost our fur in order to control our body temperature when we adapted to life on the hot savannah. Our ape ancestors spent most of their time in cool forests, but a furry, upright hominid walking around in the sun would have overheated. The body-cooling idea...