>>113865234It's probably a mix of things together. I do think it highly depends on what you are exposed to as in the puberty stages of life. If a show puts attractive characters into a fetish situation or if they show an otherwise non-attractive thing put in an attractive light. It's bound to affect someone.
Now what makes you go for certain things and not for others, well that goes to the innate inclinations, but as
>>113865345 said, I really don't think all fetishes have a natural tendency. The genetic desires are probably very mild things but in the right combination with the right exposure leads to the more extreme fetishes.