Mostly Overwatch, Dark Souls 3 and Don't Starve Together lately

I had heard that fetishes develop at a young age (2-3 I believe) when the individual is at a curious or ambiguous stage in their sexuality. When someone is in this stage they may attribute a certain stimuli to be involved with or related to their sexuality and thus a fetish is created. I Hope I explained that in a way that makes sense lol.