For my entire life I’ve been able to look at any random porn site and know I wasn’t going to see various things : children, rape, insest, scat, etc etc.

Damn, has the internet become that clean? Good for you, young people! Also: thank you, Lemmy admins, for dealing with all the child porn spam so quickly, because it’s definitely here as well.

When the fuck did incest porn become acceptable? Let alone mainstream?

It’s been there as long as I can remember, so at least fifteen years.

What has changed, I think, is how horny people have become on main. I’m not surprised the totally-not-incest stuff and other taboo topics are still around, but it seems like the shame and awkwardness of discussing or referencing it online has disappeared. No more alt accounts, isolated forums, just straight up porn references on the Reddit front page.