I think hide and Yoshiki were both definitely female-preferring bi and had quite the love for the groupies and models and however else they could get some. That said, I really also think both were in love with each other. . .
Not having read the whole thread, I ask: do you have any evidence that they engaged in group sex, that Yoshiki laid with whoever he could, and that they loved each other sexually? I would rather use the term androgyn rather than bisexual when describing Yoshiki; the two concepts are quite different. A person that is androgyn is "at home" with both masculine and feminine traits in his/her character but does not necessarily get attracted by both men and women.
I personally am quite androgyn as a character but I don't have a homophobia, nor do I think about other males sexually. There's a good "gender test" published by our national gender equality organization SETA ("Sexual Equality", our female president is a member
) but it's not available in English. According to that, I'm androgyneous with a slight tilt towards masculinity. By the way, there's genuine homophobia in some other (more conservative) countries, such as the US.
As for the second point, I think rather the reverse is true. Many of Yoshiki's lyrics are based on loss and longing and they see love as a violent and beautiful, etheric force. I think the concept of love would be much more inflated if Yoshiki engaged into sleeping with whoever he could find. You need tragedy, pain and loneliness as well as idealism to come up with X Japan's stuff.
