[NSFW] Where do people with strange likes hook up?

I’m not talking about S&M or anything similar because it’s really not that strange anymore. (Not the point)

If say one had a checklist (like I have in my mind) full of scenarios and objects not usually associated with sex. Where would one go to see if anyone has any similar interests? Not that seriously considering anything. Just wondering if the truly strange is sadly limited to serial killers and lonely dudes.

Anyone been in a relationship that turned pleasantly or awkwardly weird?