>>76793500
Other anons gave pretty good answers but I'll add this one, estrogen is arguably the main male sex hormone. Most symptoms of low testosterone are actually symptoms of low estrogen (as most estrogen produced in the male body is via aromatization of estrogen). Needs to be in a range, but too high is better than too low. And outside of breast tissue, estrogen really doesn't "feminize". Most feminine features are simply the absence of masculinization. It's why mtf trannies almost never pass without surgery and it is literally impossible (outside of surgical intervention) to raise your voice after it's been lowered by testosterone. Also why women who take steroids get so fucked with virilization even when taking less of an androgenic load than a male.