Chasing Tails
A dog going in circles and chasing their tail is a common sight. Do not worry if your dog does this since it is just a sign of playfulness, but if you notice that they are doing it excessively, try getting some help. This might signify health or behavioral issues. A dog chewing on their tail might mean allergies or anal gland issues, and it can signify OCD. Yes, dogs can get it too!
Licking
Licking is not uncommon for dogs. They do so to show affection, so your dog licking you is them telling you they love you. Aside from that, dogs like to taste the nutrients and minerals found in our skin. Still, knowing that intense licking can get corrected by training dogs properly is a good thing.