It's my absolute top kink, especially when the male is nonhuman (Pokémon or some other sort of monster). Being used so thoroughly that the male's ownership stays obvious on me even way after the breeding, and even when he's currently not around... I can't explain it perfectly but that's the jist. Not just being used for short term pleasure, but being marked forever with his seed. Throw a birth scene in it, my pussy getting stretched to its limit (and then some more~) and it turns me on like mad.