I notice my preferences tending slowly towards more 'extreme' versions of a particular set of kinks over time. I suspect, but obviously cannot prove, that this

I notice my preferences tending slowly towards more 'extreme' versions of a particular set of kinks over time. I suspect, but obviously cannot prove, that this would happen even more slowly if the porn for those tightly targeted more extreme versions wasn't easily available online. I don't think this is a problem exactly, and I'd guess it's a small effect, but I think there certainly is _some_ effect.