@ Swiftsign: mmmm! I love your defense of your idea and it's really convincing! It is very plausible that you need a critical mass of people for those in-group channels of communication to flare up.
@ Psycho Yuffie: I'm of the opposing opinion that people are born with a certain plausible range of sexual identity - some narrow and some wider, some on different points in the spectrum - but I don't think most people fall in the middle. I'm not very attracted to the idea of middleness because it opens the slippery slope that sexual identity is mostly influenced by society and leads to, yunno, bad stuff.