Why do people want their adult entertainment to be so negative, nasty and offensive?

I was just checking out an adult site “Xvideos” and I was just thinking about how soulless and dead and heartless the porn industry seems and it made me realize what a strange juxtaposition the adult world is to the rest of the world.
In porn it’s ok to be nasty in fact they encourage it.
So I’m scrolling down through the videos and I see one titled “2 fat ugly chicks share one negro cock” and I thought “Wow, really?”
I kinda burst into laughter for a second and thought whoever write’s these titles has really given up on life.
Porn is just so unapologetic and disrespectful and yet it’s so popular.
We live in a strange world.
Why do people want their adult entertainment to be so negative, nasty and offensive?