That's wasn't predictable at all, daimbars.
Gender is a load of bollocks. Boy brain/girl brain is also a load of bollocks.
"Lots of jeers and laughter at her statement 'trans people have periods' (of course trans people have periods if they were born with female anatomy)"
Don't be disingenuous. You know that we are quite well aware that transmen can have periods. Transwomen cannot - and there is currently a group of them claiming publicly that they do "suffer menstrual cramps". This is the height of disrespect for women - as well as appropriation of women's biology.
None of that is transphobic - I reserve the right to laugh at such fuckwittery. It is really, really shitty for anyone born male-bodied to try to make out they have periods. They do not.