User blog comment:MrPedroNorris/A little question/@comment-25814498-20150716220139

Cause they're not allowed to go nude even if it doesn't make sense. I mean think about it. When Wing-San told Gon and Killua to take off their shirts so that he could unlock their Nen, or when Gon and Killua gave their clothes to the bandits, they never actually took off everything, and it was mostly just because of the anime itself. Actually, I'm pretty sure the only one who's gotten naked for real is Hisoka of all people!! So no nude chimera ant's anytime soon I'm afraid.