[sqrt17]

One slightly un-orthodox solution to that problem is to find a (porn) site that has what you want, get a 1-year subscription, and consciously force yourself to feed your habit exclusively from that one site and never look at any of the other sites again. (This will be easier than it sounds at first, because you have a bowl of paid-for, high-quality content right in front of you).

Most of the addiction behaviour comes from the inconsistent reward schedule that you get when searching for content and sometimes finding some and sometimes not. If you switch this over to a behaviour where, if you feel like it, you look at some content for an hour and then be done with it, you will find that this is not any more addicting than TV or a netflix subscription.

Note that from a cultural/moral standpoint, you may prefer either of the solutions (including getting a filtered DNS connection) - it's really multiple ways to reach the preferred goal (i.e. getting rid of the addiction behaviour) and a matter of taste which one you like best.

An alternative would be to write a proxy that (i) bans all video content outside a handful of whitelisted domains, and (ii) transforms all images outside a handful of whitelisted domains to grayscale.

This will be minimally disruptive to your web browsing experience when it comes to news etc. (since news is just as good when it has only grayscale images) while it should strongly limit the appeal of any primarily visual content.