Do you have any Alastor thoughts? I’m starving, and your mind is such a treasure, so I know there has to be some gold you’re withholding from me :3
mhh, okay okay - let me try and dig some up that come to mind right now
so, first of all, alastor will rub himself all over you so you'd smell like him, but deny it if he ever got caught. it's a deer thingy, and he'd rather die again than admit he indulged in such basic instincts
he'd also not only inevitably bite your shoulder in whatever position you're currently in, he will chomp down and sink his teeth into it till you're bleeding just so he can get a taste of you on his tongue. the same goes for your thighs when going down on you. he will try to nip on every part of your body and delights in finding out where he is allowed to bite, where he isn't allowed to bite, and where he definitely should bite
... he also may or may not use those shadow tendrils on you to help him when he doesn't have enough hands - whether that is wrapping them around your waist to keep you there and guide how you should move while his hands are busy on other parts of your body, around your thighs when he needs you to keep them spread and open for him, or to simply wrap up in your hair to pull and keep your head tilted back while his arms are tightly wrapped around you, just so he can sink his teeth into your throat. (alastor biting is like a fixation, and he is feral about it)
specifically for human!alastor i'd also like to think that when he makes that deal with rosie, he is making sure you are coming to hell with him when you die. he doesn't know if simply by association with him - knowing what he does, even though you don't participate in his, uhh indulgences - you'd go to hell as well, so it's kind of like insurance. like, he'll come home one night super ecstatic that it finally, finally worked! and you're happy that he's happy of course, not knowing that he damned your soul as well. to him it's romantic - an eternity together, two damned souls forever intertwined. he won't tell you he did that, though. i may or may not be thinking about this a lot and it's your fault
those are just a few that came to me right now, if i can think of more I'll keep in mind to let you know though <3