Melissa, you know there is a huge spectrum among the CDers, from fetish dressers to identity dressers for whom this is more than fantasy dress-up. But, just because someone falls outside the full male/female binary doesn't mean they pretend. Some CDers actually do have opposite sex gender identification while also experiencing male identification. The male/female live side by side internally to varying and fluctuating degrees and this is why wearing the forms helps to bring them relief. These CDers are not wearing forms to pretend that they identify with a feminine gender, just because they are not willing to have breast implants or take HRT.
So we go back to my explanation in post #27. If the dressing (and the forms) help to bring someone in line with their gender identification even if this fluctuates, they are not pretending. They know they are wearing breast forms.