#bellefly....

its screwllum who makes the first few flirtatious moves- asking boothill about his modifications, what specific functions he has that arent human, etc. hes really fascinated esp since he's had his own sort of body overhaul himself. boothill probably starts feeling for him first and makes more offers to hang around whenever they cross paths and go for drinks. at some point screwllum sees boothill struggling to do some minor self repairs and offers to help and its like lowkey edging for boothill bc hes horny due to gentleman robot not giving a fuck ab his accent his bounty or whatever but also screwllum being like a whole hand in with wires near his torso. screwllum asks if he's ever had sex as a cyborg and boothill says somewhat and screwllums like Well do you want to see how we inorganics copulate? and boothill gets so hard he audibly lets out static

sex wise it can go 50/50. theyre both switches and both okay with being the dom or sub in the bedroom. i think screwllum prefers being dom just bc he likes observing but he wont say no if boothill wants to wirebang him

boothill learns ab screwllums 'sir' kink and likewise screwllum finds out boothill Really enjoys seeing his clothes on screwllum

so they both really REALLY love wireplay. a lot. boothill especially likes making screwllum become a mess just from messing with a few exposed panels.

when boothill is topping or whatever he loves like. mean praise. like not degredation but he looooves reminding screwy that hes a genius and a leader of an entire planet and yet he loves being turned into a mushy cpu by a wanted cowoby

boothill prefers riding (he makes cowboy jokes the entire time) whenever they both use genital attachments and screwy likes missionary bc he likes watching boothills expressions

ok this is moreso a personal general robofucking hc but each conscious cyborg or robot or whatever has a bluetooth like ability where they dont need to really 'plug in' their attachments. this makes it easier for charging stuff and for less port space. however this also means for stuff like genitalia attachments if left on their partners can make it REALLY easy to edge them or even overstim them. when theyre sexting one of them (screwllum most of the time) will take advantage of this and start basically edging boothill when he's on the low somewhere. its a game of patience to see how long boothill takes until he goes hopping to the nearest shuttle to get him back (the bluetooth function also allows them not to have to 'pack' anything persay)