There is probably something to literature being gendered. But claiming this is due to biology is hella weird.

also make sure the participants have no idea the authors have different genders, or that the study is about genders, and also

I have known multiple people who refused to believe American Psycho was directed by a woman even though she's in the opening title credits

you can (usually) clock men and women writing around hornyness topics tbh (or rather the particular focus), but airport level-novels aren't end all be all of writing. faulkner could have been a woman or agatha christie a man for all i care

you think people can read?