It is totally real. You can google it.
I am not actually the oldest kid in my family. My mother was pregnant before me with a boy, but miscarried, so technically, I'm the second boy. My testosterone levels must be pretty high because I build muscle fast (I'm stronger than all but one of the guys I work with, and some are 20 years younger than I am) and I've been losing my hair for a while (which is partly hereditary and partly due to high testosterone) and I tested on a quiz on this site as 98% or 100% male, something like that. And my index finger is about a finger's width shorter than my ring finger.
I'm not gay, or even bi, and I really like women, but it might have been a close thing.....
I do prefer women who look kind of like tomboys; slender, small breasts, short hair, active and ready for fun but introverted. When I see a woman like that, I think "Possible. I want to know you better." I have never shared most men's fascination for large breasts on women. (You know, when the woman is lying on her back, super large breasts go sideways.)
None of my GF's have been frilly or girlish. They've all had kind of a hint of maleness about them.