If we assume it's a very innocent act, it could be that the daughter is showing extreme closeness and love in a rather unique way. Maybe she saw an animal do something similar to its mother in a nature documentary and is imitating it in her own childish way to show her bond with her mom.
I've seen a mother cat that had just given birth. In the first few hours, she was constantly licking her kittens all over, including their genital areas. This licking serves multiple purposes. It not only cleans the kittens but also helps in the bonding process between the mother and her babies. It's an essential part of the early care that mother cats provide to their kittens.
Yes. For example, in the case of many mammals, the mother's licking can keep the young clean. Cleanliness is important for the health of the young ones as it reduces the risk of infections.
These stories are not ethical at all. It is wrong to peek into someone's private moment, like a mother sleeping, without permission. This kind of voyeuristic behavior can cause discomfort and harm to the person involved, and it is not in line with a civilized and respectful society's values.
In a more symbolic sense, in human relationships, it can represent unconditional love. Just like animals show pure affection through licking, humans can have that same deep - seated love for their mothers. It can also be a sign of respect and recognition of all that the mother has done. For example, a son or daughter might take care of their mother in her old age in a way that is like the animal's licking, constantly showing care and concern.
In the book 'The Cat Who...' series, the main cat character shows love in various ways, including licking. It has a special relationship with its owner, and the licking is a form of communication and affection within the story.