The methodology I was really asking was the scale, some people think this is not a valid method of gauging sexuality.
The study was really about figuring out how prevalent homosexuality was. I don't believe he himself did any work into the causes of it, although there is the Kinsey Institute that probably has done such studies.
They didn't give their own number, he questioned their sexual history (including fantasy, I think). I don't know if he actually assigned people numbers afterwards, it was a huge study, so maybe the scale was something seperate.
Nowadays they strap people up to things that monitor their pulse and other sciency things and show them photos of Ryan Gosling, and they use that to determine (without social acceptability bias) how gay they are. Except they don't use Gosling because everybody is totally gay for him, it wouldn't be fair.
You're on the internet though, so maybe just look it up on wikipedia rather than asking semi-informed warlighters.
More than incidental...
It's incidental if it's the only such dream he's had. If he dreams it more often than he sex-dreams of women then it is "more than incidental heterosexual behaviour" and puts him at 4.
Incidentally, I would never make such a pedestrian thread as this. Frank and I were playing a round of YAAT Golf, we each made a thread at the same time to try and get Aranka to reply in the fewest posts. I WON!!! By one post. THANKS ARANKA!!!!