HAHA ok walk with me again into my mind palace.....i think bennett has no blowjob technique whatsoever BUT he makes up for it with a) a nonexistent gag reflex (from regularly accidentally giving himself food poisoning on his adventurer outings!) and b) insane, off the charts levels of enthusiasm. like, nobody ever tells him that he does a good job at anything...so he'd happily slonk your shit twice a day for the rest of your life if you told him how much you loved the way he did it. (even if there's teeth sometimes.) for sucking childe's cock specifically, i think bennett's always secretly a little concerned that making childe cry every time he blows him is actually because he's godawful at this and childe's just being nice by not saying anything—despite childe's loud, embarrassed protesting that it's not that, and he is NOT crying, shut up!!!—and also i think sometimes he pretends to gag on it to feed childe's ego.