HUMAN rights activist, if you please! We advocate HUMAN rights, including transgender people’s rights.
With “sex” do you mean the genitals only? If so, we need at least four sexes, as there are people born with both male and female genitals, and people born with no discernible genitals.
If with “sex” you mean “biological sex”, the brain is also biological in its make-up. Males have slightly different brains than females, and trans-women’s brains are more female than male.
Male and female genitalia are “built” from the same materials. What is labia in women is scrotum in men. What is penis-glans in men is clitoris in women. The penis shaft is an inverted vagina.
So, the only things making you a woman are your genitals? Your brain-function and activities are exactly the same as those of men’s?
No, dyke is used derogatory about butch women who like other women. TERF is used about women who want to refuse other women equal rights.