Thanks for sharing that video: I hadn't seen it before. We may not be able to find a perfect control group (men who have never seen porn), but we could probably find imperfect groups based on society's norms. For example: we could compare people who watch one-standard-deviation or fewer minutes of porn to people who watch one-standard-deviation or more minutes of porn. Like all psychological research, it's challenging to isolate the biases (lots of people lie about their porn habits; if it's true that addiction takes place - as I suspect that it is - then many of them probably don't even know they're lying!), but it's still a starting point. I'm an occasional porn user. I certainly wouldn't say that I was an addict. But I'm older than the average person on Hubski, and I'm aware that this probably makes a significant difference to how much pornography I had access to, and how early. When I was in my mid-to-late teens, Internet pornography involved slow downloads of mediocre images over dial-up modems, and video? That involved squinting just right at encrypted cable channels! Despite being a "geek", I didn't see Internet video porn until my late teens - and even then, we're talking about tiny snippets of low-quality video that would fit into tiny animated GIFs of today. Again; thanks for sharing - great video.