They curve their tongues to collect up water/milk and peanut butter. When they lick themselves, it's pretty much the same motion as cats do. And they lick foreign objects to see if it's safe.That's...
Birds use their tongues to taste, they use their beaks/ mouths to drink.
it helps cool them off.
Well... dogs kinda help every other dog so there's not a specific dog that helps dogs.
yes. But only if your dog eats almost an your dog can drink them but i wouldnt say its good for them