I'm investigating various paraphilias and I'm trying to classify the levels of severity of voyeurism from 1 to 10. I'd be particularly interested to hear from someone who has this fetish and how their paraphilia progressed. What I'm looking for specifically is to fill out a list from 1 to 10 with voyeuristic acts based on severity/public perception.
eg.
1. Watching someone.
2. Following someone without their knowledge.
3. Imagining someone naked.
4. Watching someone doing something private.
5. Watching someone take off their clothes.
6. Using a device to record someone naked.
7. Watching someone doing a personal sexual act (eg. masturbation, etc.)
8. Watching someone being involved in a shared sexual act.
9. Recording a personal sexual act.
10. Recording a shared sexual act.

This is just an example I came up with using my own personal research. If you have an alternative hypothesis or list, or want to move them around, please feel free. Also is there something before 1? Is there something more mundane than watching someone which is considered voyeuristic? Also, is there something more than 10? Is there an act I haven't listed which is the most severe act a voyeur could commit.

This is the beginning of a behavioural study on non-physical paraphilias. I'm currently looking at Exhibitionism and Voyeurism, but if you know any others or have one yourself, please feel free to post.