Headcons of j seen Bruce sleep?
Awwww! *cue much fluff because this is one of my fave things!*
Ok, so I don’t imagine J being a very heavy sleeper. He survives on cat naps here and there until he reaches a level of exhaustion that makes him crash for like a whole day or something. So generally, he’ll be awake long after Bruce has conked out.
Sometimes he’ll just lie there and watch him, and sometimes he might run his fingers and hands over him, just because he can and because this is the thing he’s always dreamed of and now he’s got it and it’s hard to believe most of the time, so he’s just gotta touch to make sure it’s real.
He also likes resting his head on Bruce’s chest to listen to his heart because it moves much slower than J’s and he likes how deep and steady it is.
Then, of course, there are the nights J gets bored so he’ll grab his makeup bag and doodle on Bruce or give him some sort of makeover and, y'know, he hasn’t been able to do that too often because it’s just so hard not to laugh, especially when he tried out the purple lipstick on him! He also braided all of his hair once and has to admit Bruce didn’t look too bad with a wild mop of wavy hair, although the glare made him look a bit like an angry merman.
Because he’s watched Bruce so often, he’s learned to tell which nightmares he’s having by the expressions on his face. He’ll frown a certain way, or his mouth twists and turns just so and, if he can, J will calm him down without waking him, by smoothing his eyebrow or stroking his face (stahp me I’m in Uber Fluff territory now!) and him softly until Bruce settles down again.
Mostly he just likes watching and enjoying the feel of having him there. Hearing his breathing, smelling him, feeling how warm he is without even needing to touch him because J is usually pretty cold and Bruce is like his own personal hot water bottle. He just wants to enjoy having his Batsy right there beside him.