I believe that around 80% of the population is some varying form of bisexual with 10% purely heterosexual and 10% purely homosexual.
I always thought that the Kinsey scale ranged from 1 to 6 (1 being purely heterosexual and 6 being purely homosexual) with 0 added in later years to accommodate for asexual which does not fit into any number between 1 and 6. I suppose I'm wrong about that, although I could have sworn I was right.
I honestly don't think sexuality is that important. Everyone makes a big deal about it but I can't help but go 'Ehh' and stop paying attention when sexuality becomes a focus of conversation, especially when people are describing their sexuality. I just don't think it's an important part of a person and isn't in any way representative of their personality. I think I put more thought into the right amounts of milk for different cereals than I do for my or anybody else's sexuality. It may sound strange but you need to use the right amount of milk otherwise the cereal will be too dry or too soggy. This changes depending on the types of cereal, obviously, so when eating a new type of cereal you have to think about the nature of the cereal before adding milk. Milk is important to cereal. Sexuality on the other hand, is not so important to society/friendships/personalities etc. Milk is much more important than who you bed with in my simple opinion.
Unfortunately some people base their entire perceptions of a person around the persons sexuality, which I just don't get.