Well... honestly I can't suggest to you what you should do regarding this situation. I think one question here would be why are you in a relationship with a man who has been doing something like this for 15 years? You apparently knew about this 5 years ago. You thought he had stopped. But at that point he had already been doing it for 10 years. Now it's been another 5 years, you learn he's still doing it & yet he's still your boyfriend?

Another consideration it seems to me is, based on what you wrote, it sounds as though you believe he's just doing this for his own amusement. But is there a possibility he's sharing this stuff with others... or even selling it? I would suspect, given what you've shared here, there may be a likelihood he is. I don't know if doing something like that could be considered criminal. But it's certainly not something I would think you would want to continue to be associated with even if it's just by virtue of your relationship with this man.

As far as you telling the women he's doing this to about what he's doing, assuming they don't know what's been happening (which I would suspect is a strong likelihood), if you tell them they are in all probability going to retaliate in whatever way possible against your bf. And I would presume he's going to be able to figure out where the women learned of his practice. I obviously don't know what type of temper your bf has. But I would think one thing you need to take into consideration here is your own safety.

If you're comfortable with the potential consequences of letting these women know what's been going on, my personal opinion would be that letting them know could be a compassionate thing to do. I don't know if I would do so in person. Perhaps an anonymous letter to each woman would be one way to go? (Of course even done so anonymously it's likely everyone involved will know what the source was.) You could, of course, send a text or an e-mail. Presumably they're going to know those came from you which I guess is fine if you're comfortable with the potential "blow-back". But I do think you need to be careful here. You're potentially sticking your head into a hornets' nest, so to speak, regardless of whether or not these women know what's been going on. If you should decide this is something you want to do, you need to go into it with your eyes open & be prepared for the fallout. At least these are my thoughts with regard to your post. My best wishes to you.