i do actually have thoughts about this lol alskdjf seungkwan doesn't pop his own because he just Knows it's gonna get hyperpigmented and irritated and he is NOT in the mood EVER to have to deal with that.
vernon probably habitually picks at his zits and/or pops them (it's the nailbiting thing ime it overlaps a lot with facepicking) but seungkwan ends up slapping his hands away and then doing it for vernon cause "oh my god if you're going to do this at least let me use a sterile lance or something why are you doing it with your dirty fingernails you're just gonna make it worse"