My 6 month old lab likes to mouth me. Me more than anyone else in the house. I'm the one she's bonded to the most. We've always encouraged her to mouth something else. We stick a toy in her mouth or give her a chew toy/bone. She especially liked to mouth me if I'm rubbing her tummy. That said, she has never been a biter. Her mouthing is very gentle. Like a nibble. Never hurts as she doesn't apply pressure. Still, do you think it's a bad habit that I should discourage? First time dog owner so still learning. I've read conflicting advice. Some say it should be firmly discouraged even if it's gentle. Others say it's the dog's way of showing affection. What do you think?