Well technically unsolicited explicit imagery probably violates some wire and postal codes.
But they call it “obscene”, which it may very well be, but I rarely hear about “obscenity” when the recipient is not a minor anymore.
And even then, there is the arts thing, and there is the “fistgate” and other sex scandals of the Safe Schools Czar trying to expose minors to sexually explicit deviant materials IN schools. Again, no “obscenity” or “corrupting a minor” charge (recently police used a “corrupting a minor” charge against a ballpark patron who use foul language at a game).
With what passes for 7pm entertainment on the commercial cable networks and even major networks, foul language in and of itself could not possibly meet the “local standards” challenge.