you see its hard for opposite genders to non-stereotypically write about each other it happens for both genders. I often find it easy to tell if a boy or a girl wrote as the writer often hints to their own gender being superior to the other. An example would be a woman takes too much time in the bathroom, the man doesn't clean he's lazy and useless, or something stupid and stereotypical, of course, these types of phrases can be written by different genders equally however more often than not they opposing genders will write small little jabs at the other. there is also the opposite when they write about their "ideal" woman or male in their opinion the guy's shirt flies off in the wind to reveal that he's hot or something
tbh the main reason why is because its harder for opposing genders to understand each other so instead they can only attempt to understand each other based on assumptions