i am extremely bored of childlessness being dragged into this. I am not any less a woman because I cannot have children - no not all women experience becoming a mother, it does not mean they are not women
It seems crazy, but I think a lot of people take this seriously. Their logic is, if someone is a woman but isn't a mother, or a man but not a father - and not even potentially due to infertility - then reproduction can't be at the centre of sex.
You sometimes used to see a similar argument about sexuality, saying that since some people are homosexual which is not a reproductive combination, therefore sex can't be about reproduction.
In both cases there sometimes also seems to be a fear around saying that our sex, or sex generally, is about reproduction.
There is a logic there, but there is something important missing, and many, many people seem not to understand that. I think it points to something that may really need to be addressed for a lot of people.