> (a) Pubic hair, vulva, vagina, penis, testicles, anus, or nipple of a human body
Naked bodies do not harm anyone. This is US puritanism at its peek. Glad the author also pointed out the hypocrisy of treating nudity as more obscene than violence.
Of course, that wording is deliberately vague for a reason. Judges, especially conservative ones, have often let states use wording like that to get away with female-toplessness bans, blue laws, religious imagery in government buildings, etc, since that kind of wording lets them avoid including discriminatory language in the law itself, therefore supposedly not violating the constitution.