JJ justifies his cursing by saying it makes him more honest.
Once, Seung got pissed off and told him to stop and said, "You're only honest because you're dumb."
And JJ whipped out like legitimate research papers on why it suggests he's more honest. and he literally carries them around.
He gave a few copies to Yurio after defending him to a mother who yelled about her kids minds, but Otabek promptly burned them and shamed Yurio for entertaining the idea of it being okay to curse in front of children.
