Instead of a strict straight/bi/gay split, I prefer to think of it as a spectrum where 0 is completely straight, 5 is completely bisexual and 10 is completely gay.
Hah! You’re trying to squish two axes into one axis. Why not just have an “attraction to males” axis and an “attraction to females” axis? After all, it is possible for both to be zero or negative.
Reversed stupidity is not Eliezer Yudkowsky.