OOOOH ok.
MOST (i'll give a few actually)
giving: Vittorio (and any iteration of him), DATA 100% DATA, genesis? (although he is aroace, idk bro would eat serious pussy.), ozzath my fucking hated (also prom king too, but... euhhhg)
receiving: maximo (AND ALL HIS PAST LIVES. THESE MFS CANNOT GET ENOUGH.), harley, toby, ... nedwin (well, in a human regard anyways. not normally he thinks that's WEIRD!!!)

LEAST:
giving: mical, emir (his literal only exception is maximo but he always HAS to complain and bitch about it before he inevitably gets wayyyy to into it), glare (his BRACES...),
receiving: mckenzie (LOOK. HE THINKS HAND STUFF IS WAY MORE APPEALING. HE'S NOT GONNA TURN ANYTHING DOWN, BUT LIKE. ITS NOT HIGH ON HIS LIST.), emir a second time (either he's getting railed or touched or nothing is happening sorry. he also will not return the favor sorry.)(HE'S SUCH A PICKY LITTLE BITCH)