It isn't about seeing x-rated stuff as art, but rather about the ability to be open about sex. Traditional-minded people are rarely as open about it in my experience.

I'm female. I watch porn. So does my spouse. There is no secret there. If either of us were going to a strip club for whatever reason or visited a prostitute somewhere legal, we can simply tell each other about it knowing the other won't be angry. We can openly discuss folks we are attracted to. We understand that finding others attractive is normal human behavior, and would rather not lie about it.

On the other hand, I've known plenty of women that get angry about men watching porn. I have known plenty of men that won't admit to their wife - this person they claim to trust - that they watch porn or have visited a strip club. There are others that actively protest against porn for whatever reason. In general, you find more "porn is morally wrong!" arguements in conservative environments.

Most sane stance I've seen yet.

"visited a prostitute"

That's pretty fringe...

That in particular is, and hasn't been something that happened. But you know, if either of us want something the other isn't so willing to do, we both understand. Not such a big deal for us - though I do understand where it would be a line for other folks. And that's OK, the main point is to be open about this sort of thing and be able to discuss it without fear of the other being angry. Yes, this has been discussed in my household, more in the theoretical sense because we both have some hesitations about the other person not wanting to be involved or worse, forced by a third, unknown party... even where it is legal. My own main reasoning for wanting such a thing is because I'm bisexual, and there are lots more men available for me than women. Folks have urges and get stuff stuck in their head, after all. Being able to share these thoughts is pretty great.

The rest of it is pretty normal stuff (watching porn, being physically attracted to others), though it is stuff folks tend to not discuss openly.