I say that there are three dimensions to 'gender' in people. They are not binary roles, they are on a scale. Just for the sake of discussion I'll say it's on a scale of -1 to +1, with any level of decimal points being welcome. (I am going to say that the 'female' end of the spectrum is going to be the + side since the symbol for female happens to include a + under the circle. I am in no way saying female is superior, I am just picking a simple way to easily remember which end is the + side. +1 is 100% female, -1 is 100% male, 0 is 100% androgenous).
First off, there is sex. Being what biological sex are you. I was born male, however I am rather small frame, and exhibit a few physical characteristics that make me mostly seem male. So I would say I am roughly .8 to the male side (making my sex -.8 )
Next, there is gender identity. That would be what you feel like you are. I feel ever so slightly more male than female, but it is very slight. I would say I am .1 to the male side (making my gender -.1)
Lastly there is sexual preference. I really like both, but I like girls more. So I would say I am .25 for preferring girls (we'll go ahead and make the statement that preferring sex with females is a male trait, and preferring sex with males is a female trait). So that would put me at -.25.
So if we put them in this order, Sex,Identity,Preference, I would be: -.8,-.1,-.25
I'll go ahead and be arrogant and call this the "Simplified Kir Scale". If you want to play "pin the social stereotype on the donkey" you could even take an average of the scores and say I am -.38 male, so society would probably view me as "a third male".
But let's up the complexity just a tad. Different people are more or less heavy on the different axis. Some people identify VERY strongly with a gender, and don't really notice their body at all. Some people LOVE sex with ANYTHING, and some people don't want sex at all. So let's add a strength rating to each of the axis. For the strength score we will go for 1 through 0, 1 being you are very something, 0 being not really at all (example, if you want to have sex really bad, that's a 1, if you don't want any sex at all, that's a 0).
Body wise, I am pretty strongly male, and pretty strongly female, both (whereas some folks don't really exhibit attributes of either gender). I would mark the strength down for .75
Identity wise, I am not so strong, I would say better than half though, so we'll go with .6.
Preference? Yes please. Mark me down for a full 1.
So on the "Extended Kir Scale" I come down as -.8(.75),-.1(.6),-.25(1) Now, we could average the strength scores to say that my total identity has a strength of .78. It get's betters! Let's take the strength scores times their values and average those... ((-.8*.75)+(-.1*.6)+-.25*1))/3 = -.3... Meaning society would view me as LESS than .3 male (less than a third male).
So in recap, I am:
SKS: -.8,-.1,-.25:-.38
EKS: -.8(.75),-.1(.6),-.25(1):-.3
(modified to fix a number that decided it should be a smiley face)