Common reasons include:
- affection
- seeking attention
- exploring scents and tastes
- stress relief
- social bonding
- submissive behavior
1. It Can Be a Sign of Affection

Dogs often lick people they trust. Many use licking to strengthen social bonds, similar to how wild canines groom each other.
Dogs
A dog that approaches calmly with relaxed body language and gentle licking is often showing comfort and familiarity.