For instance, our brains reward us for figuring out problems, we get pleasure hormones like dopamine, and conversely, our brains warn us about potentially threatening things with stress hormones like adrenaline and then, just for good measure, it throws in a little sugar burst from our livers to support us to run or fight. (creativeboom.com)
A dog that licks your hand with affection or waits patiently for you to come home can flood your body with pleasure hormones and anticancer drugs. (simplypetsmagazine.com)
So naturally, licking reminds him of something happy and releases pleasure hormones called endorphins. (dogcare.dailypuppy.com)