
A Friend whose bitch has a CC and a RCC has had her show career ended because of the licking habit of her daughter and the damage it caused.
First it discoloured her ears, and made them sore and then she ended up with a blood blister which after treatment has spoilt her ear carriage.
I think the reasons for this habit can be comfort, stress relief etc, in the same way as dos that suck and lick at their feet or other parts of their bodies.
My Jozi had to have an Elizabethan collar when she had an eye ulcer. As she couldn't do anything about the discomfort she redirected her attention to licking her feet. Every now and then she will lick again when she is bored or on a long car journey etc. Her saliva is such that she makes her feet orange/pink in colour instead of the pale cream/grey they should be.
She is quite licky anyway and will lick my legs and given the chance my feet.