Dogs lick your face for many reasons, including to show affection, to groom you, to spread their scent, and to get your attention.
Dogs lick their owners as a way of showing affection. It's a natural behavior that they learn from their mothers when they're puppies.
Dogs also lick their owners to groom them. They'll lick your face, your hands, and even your feet to remove any dirt or debris.
Dogs lick your face to spread their scent. This helps them to mark their territory and to identify you as their owner.
Sometimes, dogs lick your face to get your attention. If you're ignoring them, they might lick your face to get you to look at them or to play with them.
In most cases, dogs licking your face is not a problem. However, there are some situations where it can be annoying or even harmful.
If your dog licks your face too much, it can be annoying. You might not like the feeling of their wet tongue, or you might be worried about them spreading germs.