A man never gets a period, never has to worry about an unwanted pregnancy...
This is why a man can never become a woman.
At all.
Ever.
They can change their outward appearance but the biology of what makes a male a boy then a man is all still there.
The DNA, the chromosomes, the genes, and all that other inner stuff that can never be changed to represent him as a 100% real woman.
He is only fooling himself and those who do not want to offend him go along with it just to humor the mental case freak.