I'm talking specifically about the kind that have no shame sharing every sick thought that crosses their mind.

At some point in the relationship, they get so comfortable and confident, that they casually reveal some twisted fetish.

I know that on reddit this is considered a good thing, because it means he trust you and shit.

Naah.

They just think you're not going anywhere.

I don't think it's supposed to be like this, you shouldn't dump all your twisted private thoughts on your partner. Just because we're in a relationship it doesn't mean that social etiquette don't apply.