I don’t think the Kinsey scale is about judging how straight or gay (or how in between you are) but showing that it’s a continuum rather than binary.
I think sexuality is more an X-Y grid, how much you like something versus how much society approves or disapproves.
“Fifty Shades of Grey” comes a!ong, and it becomes more acceptable. Studies say that women are more “fluid”, but men give constant approval to the idea of two women together. It’s changing, but not many women are vocal about seeing two men together.
So without society’s approval, it leaves only the people who can’t live without the desire. If society loosens, more people will try something, and leading away from the extremes to somewhere in between. And it’s recursive, as people change, approval changes too. There will always be people who only like one flavor of ice cream (and nobody demonizes them) but when there’s less demand to be one or the other, many may give up the “extremes”. It’s less important where someone fits on the scale than that there are people somewhere in between.