- Adult Baby, Diaper Lover, Little
I can explain this from personal experience. You do not have to know what genders are or the private parts linked to that to feel the dysphoria.And another thing I find interesting is how trans kids seemed to be aware of their gender before age 3. I was not aware of my own gender until age 5. I didn't know only boys had penises and girls didn't have one and once my mother explained it to me, that explained why mine looked different than my brothers and why my baby cousin had the same privates as me and I thought babies had penisis and then they fell off lol. I also thought my dad looked weird down there until my mom explained he was a boy. This is how cis gendered kids learn about sex, they learn about between their legs that determines their gender and then they learn that women have boobs and guys don't. But I guess that is what gender dysphoria is, they just know their own sex and gender before they are even taught pronouns and sex while cis gendered kids have to learn this stuff?
I guess it varies with person to person with degree of awareness of the world. At this age you can be very well aware of the "gender norms" that society puts into place. You rejecting them, and wanting to do something else causes the dysphoria. This is more common in M to F because like you explained yourself, it is way more socially acceptable for a girl to like boy things and that is simply called "tomboy" But when you are a guy liking girl things your teased to hell being called sissy, you can even be mocked with how you sit and other small gesture mannerisms. (I had to ignore a lot of emotional hell in grade school)
For me, it was more like hiding everything, in my mind it was always "stay away from liking that, not allowed" even if I did not have the vocabulary to speak such at the time.
There is something I will admit not knowing, and that is can very young transgender kids, like at age 3, can do so without having dysphoria. That really depends how they come out and how willing the parents accept them. I am willing to bet though, you see young transger kids due to a high dysphoria. If you are still confused what dysphoria is, go to 8:02 in that vid, that is not simply being trasnsgender anymore, that is dysphoria. (along with the given time stamp making her take all those pills due to mislabeled physiological problems)