I know I’m a little late to this party! But I wanted to make a suggestion: as you say, primal can apply to relationships of all kinds, with genders and sexualities of all kinds. You might consider using “Predator” and “Prey” instead of any sort of gendered or sexual terms. It would remove the need for the disclaimer and make the article much more inviting for a large population.

Otherwise, though, thank you! I didn’t know what Primal meant, but now I see that the specific combination of human pet/brat that I am, and the type of caretaker I want, is very effectively summed up by Primal Predator/Prey.