So often with genderflip, it's done for cheap laughs or because the author wants to ship two male characters but doesn't like slash, or whatever. You did an excellent job of making the genderflip matter. I liked the way you talked about women and sexuality and different standards and sexism and the fact that being privileged (in this case, male) blinds you to the realities faced by those not sharing that privilege, even if the privileged person is genuinely unprejudiced, or trying to be. And you showed how it's not all cut and dried, same-for-everyone, simple. And the sex scenes weren't just thrown in for the sake of having a sex scene, they were integral to the development of both your theme and the plot. Well done!