the second you find out that lucifer has wings, you're facinated. you want to see them and admire them, asking him questions and trying to prompt him to show them to you. while he adores that you take an interest in a part of himself he usually hides, he can find your fascination a little too flattering sometimes. you in awe, admiring him, makes him bashful and stuttery. cursing his own inability to make words.
oh you're totally going to surprise lucifer and pop up next to him because he flares out his wings when he's surprised. puffing them up like a grumpy little pigeon. it's usually followed by huffing and crossed arms, and those pretty wings vanishing again.
and you just go to him, batting your eyelashes. "luci, baby, there's this pack of cookies i really, really need right now, and it just so happens to be on the top shelf- do you think you can fly up and get it?"
he'd raise an eyebrow, looking up from whatever work lucifer's trying to force himself to get done. fighting a lack of drive is hard enough without more desirable distractions like you pulling him away from his work.
"if you do it ill give you a kiss-" man literally /tp's himself and is in front of you a few seconds later, his wings settling again and holding the cookies out to you with a bashful smile. he wants his kiss.