Art is not above law. In the same way you would not feature children in this “art”.
For example, Maryland specifically excludes art [1]
IIRC a good majority of the US states (but not all) do as well.
[1]: https://mgaleg.maryland.gov/mgawebsite/Laws/StatuteText?arti...
Shit we accept as art today would have probably caused riots 500 years ago.