[deleted response to attacking comment - Moderator]
Aquarius is the fixed air sign. Air means mental, even intellectual. Ideas are important to the air signs. Having found some ideas it believes to be correct, Aquarius is reluctant to change them. These ideas may be futuristic or old-fashioned. To the Aquarian, if they're true, there's no point in changing them.
In traditional astrology, the air and fire signs are masculine. This includes Venus-ruled Libra.
But let's unpack what you mean by a woman coming across as "masculine." Short hair? What about long-haired men? Are they somehow feminine? And why is it that some people call any woman who doesn't look sufficiently girly a lesbian? Many very feminine looking lesbians would be perplexed. As would many short-haired heterosexual women. A former friend of mine who was lesbian was very striking in her youth, with long hair and bright blue eyes; and men would hit on her, even though she was not interested in them.
My sun, Venus, and Mercury are in Aquarius. I am a long-married wife, a mother of two adult children and new grandmother. When I was a young adult, I wore my hair fairly long. It was naturally thick and curly. But long hair ceases to be flattering for older women; and hair naturally thins out as women age.
More to the point, a lot of Aquarians are not into what other people think of them. This is the Uranian part of our nature. We have other more compelling interests than meeting someone else's immature stereotypes of what a proper female should look like.
I have never known women to feel comfortable in men's trousers, once a girl's hips develop. Possibly some Aquarians prefer a more "masculine" style, but men's pants simply do not fit around women's hips very well.
Just remember that on Planet Aquarius, we are the normal ones.
. We are know it alls
fml
