Professional Burger here. Fetishes are a direct result of the Internet. I'm talking about Porn and Social Media. With an unlimited amount of Free Porn, men have quickly run out of Opiates from the Vanilla Porn or even relationships of the 80s. When you can get a 10/10 supply of new women every day, it raises your "drug tolerance".
Thus you begin to look for higher opiate responses. Vanilla porn no longer does it. Now you need group orgies. Then that is not enough. You'll soon need to view scat/piss and so on. It's a typical drug addict behavior. The site,
YourBrainOnPorn.com covers a lot of this.
We do it because with the "mass communication" of the internet, we're more isolated than ever. The sexes are turned on each other by (((them))) and so we look for opiate responses through fetishes. We are often denied simply things like affection and touch with our paranoid society.
For women, it's Manufactured Outrage. When they don't get enough opiate response from posting selfies online, they will turn "activist" and then eventually step it up to street protests. They think they are heroes and righteous. Thus....an opiate response. They are pissing off men and it's giving them a high.
Finally, take the sex doll threads. Same shit. It's not like men want to fuck a piece of plastic. They want pure revenge on women. They want that high of crushing an enemy. It feels good man. That's why we have opiate responses in our brain.
Once society collapses, women will become subservient again and both sexes will get spirituality from the family unit. Then fetishes will fade away once again. But until then, I'll be locking myself in the Holodeck with my waifu.