So, according to beyond "Orcs regard battle scars as tokens of pride and ornamental scars as things of beauty.". So I like to imagine that Fjord is super into his roommate's scars since the first time he saw them. And Molly is actually into cutting his skin because he associates it with power, adrenaline and excitement of fight. Also he has a really high pain threshold so he needs a lot of stimulation to get those bdsm endorphins.
+ Power bottom Molly
++ Body worship
++ Tail kink
+ Local clerics being done with healing their kinky friends every morning
-- dub and non con
--- scat, pissing, sounding