Hormones can play a role as well. Anecdotally, my wife's hair during pregnancy became fuller and less brittle. Duckduckgo "pregnancy hair". A monthly cycle, being on hormonal birth control, etc. will likely have some effect. I definitely agree that genetics does play a bigger role, but claiming that gender/sex plays no role is definitely incorrect.

Cool. Joke is "men dont buy products so they use shit at hand".