Seems to me that this represents the trend, something you'd like to ignore (you call it society getting "more frank with itself regarding sex"). C'mon.
So, how long before hardcore hits the shelves? Then extreme hardcore?
When we reach that point is when I'm saying that there'll be an increase in the production and distribution of kiddie porn. Like porn producers won't cross that line?
If, after a half-century (beginning with Playboy, although porn certainly existed before it),and INCLUDING the '60s, that's all that has happened, we're in no trouble.
Sorry, but there is no evidence to support your slippery-slope arguments, historical or otherwise. It's merely an attempt to motivate others with unfounded fears. Gun cotrollers, as I said, do this as well. It's not even CLOSE to sufficient cause to restrict the liberties of other peaceable citizens. However, those who seek to do so frequently resort to such tactics. I suppose I should not be suprised to see you take this tack...you've tried all the others.