Originally Posted by neewwman

There is no law that says fisting (or depictions of fisting) is "illegal."

There is no law making depiction of any particular sex act "illegal."

The only thing that is illegal is "obscenity," which means answering "yes" to the following questions:
(a) whether "the average person, applying contemporary community standards" would find that the work, taken as a whole, appeals to the prurient interest
(b) whether the work depicts or describes, in a patently offensive way, sexual conduct specifically defined by the applicable state law; and
(c) whether the work, taken as a whole, lacks serious literary, artistic, political, or scientific value.

Cautious lawyers advise against depictions of fisting because such depictions are more likely to be found to be "patently offensive." Same with facials, pissing in someone's mouth, stuff like that. But no act is inherently "illegal."

By the same token, some jury somewhere might find two fingers in a pussy to be "patently offensive" and suddenly that act is illegal. There are many anti-porn agitators who think all hardcore pornography is prosecutable obscenity and that the government should prosecute it. By their definition, a cock in a pussy is "illegal."

Ultimately, a jury tells you what's "illegal" after your trial and there's no sure way to know before hand.