-He hates it when you spend too much time with anyone else, so much so that he’ll start to aggressively nuzzle into your neck to get your undivided attention since he’s about to get dangerously jealous, this makes the black goo from his sockets smear against your skin which is satisfying for his possessive instincts
-If jack starts to do this just casually raise a hand and start to scratch and rake your fingers through his hair and he should start to calm down so you can keep on chatting to the creepypasta, if you two were alone he would purr but he can’t infront of the pasta since he has a reputation to uphold
-If jack gets increasingly impatient and wants all of your attention he’ll remove his head from your neck then will growl at the pasta which should make them get ’the hint’ but if they don’t and continue to stay he’ll physically throw them away from you
-This could lead to an confrontation depending on which pasta it is so you’re forced to watch jack fight some creepypasta out of jealously and aggression because he wants your full attention, jack picks his fights wisely so he’ll most likely come out successfully with minor injuries and a bigger ego
-He’ll then smother your body with his so you’re covered in his warmth and scent so he can subtlety purr as he clings to you, just pat his head and he’ll appreciate the attention- but if you want to hear his loud purr give him praise and loving strokes then you’ll literally feel his purr vibrating against you
-Try not to rub those black stains off what he left on you when he’s around you since he has a thing for seeing you with those smudges on your skin- if you ask him why he won’t awnswer, maybe it’s a demon thing? Who knows?
No offense jack but it’ll probably be quite sweaty with your demon body heat man (• ε •)