biting

Friendship and physical contact in Jewish culture: the Sixth and Seventh Lubavitch Rebbes.

Touching may include:

Holding hands
Interlocking arms while walking
Bear hug: gently enclosing the arms around the trunk of each other or holding them against you
Sitting on, sitting near or lying against another person, resting one's head on the other's shoulder, lap, etc.
Caressing (petting): gently stroking body parts or hair with a hand
Cuddling (From Scots)
Massaging a part of, or the whole body
Kissing
Licking

A muzzled German Shepherd.

A muzzle is a device that is placed over the snout of an animal to keep it from biting or otherwise opening its mouth.