I read that Ainu women tattooed their lips to resemble a beard, which was seen as aesthetically pleasing. But the tattoo was also supposed to keep evil spirits from entering the body. The markings on the hands also served a similar purpose. They would add more and more tattoos on the arms and lips as they grew older.
Imagine your otp’s, never having met before, dogs coming loose from their leashes so they chase their dogs down but end up losing them but later the two meet and discuss them losing their dogs before finding them humping in an alleyway but neither of the dogs are fixed so they have to keep in contact because they each have ownership over the (soon to come) puppies.