It has to do with agency, primarily. Is the character in the media given the agency and depth necessary to support their sexual appetites? Or are they treated like an object by the camera, a 2 dimensional cutout whose purpose is only to be an object.
Compare, for example, Sex and the City, where 4 women were regularly engaged in a variety of sexual encounters and say, background dancers in a music video or advert that exist to appeal as objects to a male audience.
