I'd imagine that male nipples are exempted due to the line that mentions "applying contemporary community standards".
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.
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.