https://www.tumblr.com/kaeyx/779265353531457537/what-if-what-if-fucking-the-3-eldest-demon-bros?source=share
oooo~
share all your headcanons ;)
Yes ofc sorry for the delay! Have some thoughts in relative order (and again please check out this fic)
Lucifer: To me Lucifer has the picture perfect dick. YA novel male love interest dick. 6 inches long and thick enough that he has to finger you open for a bit before going in, and you can see how much he likes it. Always has an annoying little smirk on his face when he makes you cum around his long, slender fingers. He's prone to degrading you during sex but honestly that's to be expected, fucking you feeds his ego like nothing else. He's not a fan of showing you off or public sex in general though (that's Diavolo's thing), likes to keep you to himself instead.
Soft sex is possible but he has to be feeling mushy beforehand, like from a date. Lucifer usually prefers to take his frustrations out on you during the act and saves the gentleness for later, when he runs you a hot bath and washes your back.
In his demon form not much changes, except he's proportionately bigger and meaner. His cock grows stiff, fleshy ridges along the underside and he loves the noises you make when he fucks you from behind and they rub against your insides. The biggest differences are him biting you all over and fanning out his wings to cover you both, simultaneously shielding you from the outside and preventing your escape. Grab his horns for support, he loves it.
Mammon: My sweet Mammon, my perfect boy. His cock is short but abnormally thick, to the point where penetration is almost not worth the hassle. He distracts you from it though, always kissing you and groping you while he humps his cock against you until he finally nudges inside. He always whines so prettily when you squeeze around him, it's so obvious he's in love with you. Mammon fucks hard and fast, desperately chasing his next orgasm while simultaneously trying to wring one out of you. He'll do and say anything practically anything to get you off, just please let him hold you close and finish inside you.
In demon form he's always half hard, ready for you to drag off to a secluded corner for a quick fuck. You can rile him up anytime but it gets ridiculous when his horns and wings come out. His cockhead grows pointed and a fat knot appears at the base of his already thick cock. He gets touchier than usual and purrs, or messes with your hair/clothes as a way to preen you. Imo he frequently proposes cockwarming bc he wants closeness, but always ends up getting needy and fucking you.
Leviathan: Well it's been said before but Levi has two cocks, period. The one on the top functions as a human's would and the bottom one is reserved for laying eggs. They'd both look fairly weird, I see them in my mind as those alien themed dildoes with strange shapes. They're always slightly cold and produce copious amounts of clear slick instead of normal precum. In his demon form I'm not sure what would change... his skin would be coloured differently, maybe blueish-grey or scaly. His ovipositor probably bulges and becomes more noticeable, as opposed to his human form where it's not that visible.