Hello, I'm here to change your sexuality, there is no such thing as straight or gay, in my opinion we are all pansexual, but some of us are gynephilic (attracted to feminity) others androphilic (attracted to masculinity) some are both.

Of course women can be masculine and men can be feminine, what matters is presentation, you're attracted to presentation not gender.

Ergo if a femboy is so feminine that you're attracted to them it's normal, it just means you like feminine presenting individuals. (Means you're straight, but what does straight even mean bruh)

However there is something important to take into account, romantical attraction, you can only want to date women but like a more manly presentation in that case you are still androphilic BUT you're romantically attracted to women. Which is probably an oversimplification of butch lesbianism, or liking tomboys.

This is my theory on the subject, it's probably flawed somewhere but I need other eyes to see it.

All in all, like who you want, be who you want.

The Real Man™ answer is that liking tomboys, or femboys, or anything outside of the "norm" for that matter, makes you not straight.