A trans woman is not a woman. Woman = adult human female. A trans woman is not female. A trans woman does not have a vagina/cervix/uterus/fallopian tubes/ovaries/breasts etc. A trans woman requires prostate examinations, not smear tests. a trans woman will never die of cervical cancer or ovarian cancer and is very unlikely to die from breast cancer. This is simple biology.
Please don't give me the argument about women who have had hysterectomies and mastectomies. Having your reproductive parts and breasts removed makes you no less of a woman than having your penis and testicles removed makes you more of one.
All of these things above, when said out loud, hurt the feelings of trans woman. But, I'm sorry, hurt feelings should not get in the way of facts. They also should not get in the way of quotas for women (on boards, for scholarships, sporting teams etc) or crime statistics. When a trans woman commits rape, that should be recorded as a man committing rape, not a woman. Ever. But it is, in some places, and that makes me want to howl.
Trans women want to be women. They really, really do. I get that. I'm sorry that the fact that they're not makes them sad and sometimes suicidal. But they're not and they never will be. And I think we haven't considered that their desire to be one is not that they have the wrong body, but that they have a psychological problem, and we as a society have a problem with sex and gender expectations.
They may also say they feel like a woman. But my answer is, well, what does that feel like? Everything that makes me feel like a woman is related to my sex. Breasts, periods, trying to get pregnant, trying not to get pregnant, childbirth, menopause (not yet, but it will come), my body after pregnancy. All the good and the bad. UTIs, abortions, thrush, a pelvic floor shot to hell and brought back to life (thanks, pilates), sore breasts every month. Lumpy breasts for no particular reason.
Transpeople should wear what they want, fuck whoever they want and do whatever they want to their bodies (though I wish they wouldn't) , and feel safe, without being abused. I know that this is not happening to them at the moment and that is a bad thing. I saw a Ted talk recently that featured pictures of a trans woman after she had been beaten. I felt sick about it and have been thinking about it ever since. It does not change my view. If we must have gender, then what the hell, choose yours. But you can't choose your sex. It's out of your hands. Your sex was chosen the moment sperm met egg.
Despite what some trans people will say, my views do not contribute to their abuse. If everyone thought like me, then trans woman would not be recognised as women, but they would be safe and be able to freely walk around identifying as whatever they wanted, wearing whatever they wanted and (ideally) not mutilating their bodies.
I don't need a qualifier. I'm a woman. I'm not a ciswoman. I wish you well, but I'm not your cister.