It's okay, because they're totally the cutest. Coast on your looks, lil' guy. Coast straight into my heart.
Actually, I'm pretty sure he's teething and that just feels delicious on his pointy-ass puppy teeth. I've fostered a few litters of puppies for Rocket Dog Rescue* and so I know a thing or two about being nibbled on by pointy-ass puppy teeth. Also, stinky butt puppy shit. So much stinky butt puppy shit. THAT SAID: FOSTERING IS THE BEST DO IT.
*Also, the pit bull inspiration for the graphic at the top of Rocket Dog's page is my dog, Hazel! FAMOUS DOG NO AUTOGRAPHS ONLY TREATS PLZ.