Explore the world, one post at a time
(Fav - least fav)
Guilliman x Angron - Pure Hate fucking. No real kink, barely any after care. The only foreplay is an argument, or more often than not, it's just Angron trying to shut Guilliman up when he rambles about taxes
Magnus x Jagathai - In my opinion, the most wholesome of all the ships. Like they might get a bit freaky in the bedroom here and there but usually no more than light bdsm if that. They love being flirty and just being around each other. Magnus reads to Jagathai while the Khan works on his bikes
Fulgrim x Ferrus - A classic, the ship that got me into shipping the primarchs. Literally femboy x Muscle Daddy. Fulgrim has every kink and fetish under the sun, and Ferrus indulges him because he loves to make his brother happy. They also love going out on dates and being cute together.
Horus x Sanguinius - I know I'm gonna catch heat for this one. Sorry, @moociaoafterdark . It's not my least favourite, but I gotta admit it's like a good in-between of Fulgrim x Ferrus and Magnus x Jagathai. You have the wholesome playful interactions with a bit more spice than Magnuthai. Like Horusang aren't trying everything in Fulgrims playroom, but they are definitely in a sadist x masochist relationship.
Dorn x Perturabo: . I wanna say hate fucking but like it's only that for Perturabo and even then sometimes. They're both their own brand of autism and they'll get on each other's nerves, but honestly, as a couple They're pretty "solid".
Konrad x Vulkan: Honestly? This is like the last ship I'll actually push for. Even then, I'm on the fence. I think these two are a wombo combo of Angron x Guilliman and Sanguinius x Horus. Like Vulkan being a pure masochist who regeneration from anything x Sadistic horrific Konrad who's constantly coming up with more torture methods to use on Vulkan. Vulkan is more than willing to take the pain if it means curbing some of Konrad's more vile urges.
Alright, these next two ships are honourable mentions. I could take or leave them. I don't really ship SHIP them, but I think their relationships would be funny:
The Lion x The Twins- Both Legions and primarchs have their secrets and play things close to the chest. I can totally see El Johnson treating his relationship with the twins as his dirty little secret. He would also be one of the only people to know their are two, not one. You also get to throw in some Twincest free of charge.
Leman x Corax - I'm mainly doing this one for two reasons Loud bombastic jock x quiet sulky goth/emo and reason two is the relationship between Corvids and Wolves. It's one of the most iconic symbiotic relationships in the wild. I don't really have more than this.
Finally, you're no doubt to notice I've left 2 out(no, not the missing 2). Well, for them, I have my own personal headcannons.
Lorgar- Huge fuckin simp for Emps but is kinda heart broken when he finds out he can't fuck God. So he goes to whichever of the couples will have him for a threesome sometimes. He's almost as kinky as Fulgrim but is unabashedly the most deviant of all the brothers. Sometimes Leman obliged and cucks Lorgar while spitting on him. Sometimes Horus and Sanguinius need a whiny subby blood bank. Lorgar is just a massive pervert.
Finally the best for last! My fav primarch: Mortarion!!! - so I put this in the tags of my last post. I totally see morty as Ace, especially Aro/Ace, but he's not sex adverse. In fact, he loves masterbating and has a few kinks that would make Fulgrim blush. He's truly oblivious to his brother's relationships, but he loves to get behind closed doors and not shower for weeks while working it to his own rancid smell. He might torture some serfs with his smell while forces them to eat him out. (What? You thought Sanguinius was the only Trans masc?)