thinking about devil lore affecting how they have sex
angel can't touch people, so he likely has clothed sex with aki- with aki sometimes tied because he keeps touching angel's skin. or they just masturbate together
with quanxi, pingsti takes a curious approach with having sex with a semi-human, cosmo accidentally breaks her mind sometimes due to excitement, long drinks her blood and tsugihagi (because of the stitches) probably dismembers her
himeno (who isn't a devil but has a contract with one and uses it actively) uses the ghost devil to restrain her partners as she has sex with them
it's hard to fuck any of the hybrids without accidentally activating their devil forms (making out with barem and pushing his molar, or fondling spear's neck and pulling out the spear lodged in it)
violence is probably the only fiend to have simple chill sex and simple chill aftercare lmao
there might be more but i can't think of them right now so i might follow up with another one later
