[Urbane Guerrilla]

Not, I think, a slippery-slope problem so much as there's nowhere in law you can sensibly draw the line, so there I see eye to eye with you. You either absolutely prohibit all traffic in nude images however asexual, or there's really no way you can make an intelligent, respectable law allowing some, but not some other. Potter Stewart didn't think this far, but his remark amounted to a confession that the law couldn't do a good job of regulating sexual artistic expression -- any better than it could regulate any other kind of artistic expression. This was one of those things that made the Sixties necessary, in spite of the boxcarload of rampant idiocies that arrived at the station with them.

Pornographically, you're left with the market doing the regulating. Everyone has a pretty clear idea of what would be beyond the pale -- at the very least you'd select by probability of informed and legally competent consent -- so this is not the surrender it might seem.