@CarlyMx LOL! That's cute!
I've often thought I'd love to meet a clone of me to either date for be best friends with!
I've always just been myself, not realizing for most of my life that part of me saw myself as male.
I began reading up on it, and found that physical gender is formed in the first trimester and gender hormones initialize prenatal brains in the second trimester. According to one study, even the girly girls and macho men have only 80% of their birth gender traits. Male hormones are usually deposited on the right hemisphere of the brain, and female on the left.
Both sides of people's brains are initialized with some hormones, because everyone is a gender spectrum, but usually the majority of the gender hormones match the birth genders.
As the gender hormone sliding scale moves toward the middle, people can be born with increasingly strong opposite gender traits, yet still identify with their birth gender.
Nobody knows the tipping point where people see themselves as the gender opposite their physical gender. It might not even have to do with the percentage of gender traits, since my sisters have far more male traits than I do, yet identify as female.
So, really, all of us are both genders, in a way. Some of us identify with only one gender, some identify as both genders, as in my case.
I mostly identify as male, but I have a weak female side, so I'm not "all" one gender, either way.