The Limoncelli Scale of Sexuality
Kinsey's and Klein's scales try to be unbiased so they don't promote a particular agenda. However, that is not possible because the way we measure things affects the way we think.
Scales that mark heterosexual as 0 are likening it to "normal". Subconsciously people think of these scales in terms of measuring how far from normal (heterosexual) one is. Also, while it attempts not to, it has the unintended affect that it institutionalizes two "ok" sexualities at the extremes and adds some freaky weird thing called "bisexual" that is in the middle.
The Limoncelli Scale of Sexuality instead makes no pretenses in its agenda. Its agenda is to promote a bisexual-centric way of thinking. Therefore, it puts the bisexuals at the top position, which subliminally indicates that that is the "normal". Then it measures how far away from normal one is by placing non-bisexuals in the disastrous "far from normal" position of "6". However, it does still put the vast majority of the bisexuals in the middle, but that's ok... from what I hear they like that kind of thing.