My unscientific view is that there are a bunch of things that come together.
Some of it's probably innate. We know that, on average, boys are more object focused and girls are more people focused. Boys are more visual and girls are more verbal.
Lots of kinks and fetishes will have their roots in early life, even in the pre-sexual stage.
Obviously women have fetishes - I've never believed the line that only men have them. But men are much more likely to have seriously weird fetishes and much much more likely to become obsessive about them.
I think the easy availability of online porn is a huge driver here. We know a bit about how social media algorithms work - they give us more of what they think we want. I once watched a YouTube video of Sylvester Stallone on a talk show, and I swear, for months afterwards YouTube thought I was the world's biggest Stallone fan.
And that's where the likes of Pornhub come in. Take a man who's long term single in today's anarchic sexual market, or even take a man who's in a relationship but finds himself alone for the night and horny. Pornhub will take whatever latent fetish he has and put rocket fuel under it.
This is where it gets to be addictive. I haven't read The Fix by Damian Thompson for a few years, but it's a fascinating book about addiction and goes a bit into porn addicts, how they'll collect enormous numbers of images and obsessively catalogue them, looking for that perfect one that's always just out of reach.
That part of the book reminded me a bit of obsessive stamp collectors. There's a strange bit of the male psyche that leans into obsession in a way that women find hard to grasp.