Since the beginning of my time on earth, I never understood what this question meant. I still don't. Is there a definition to that question? Do you know the answer to the question? Is there any major benefit in knowing?
"There are people here who won't even show their face, let alone their entire body. Yet, you expect me to."
They haven't tried to claim they have an hourglass figure, blonde hair, and blue eyes. They don't care as much as you do about being seen "incorrectly", save for a select few others who pretty much are being requested the same sort of things (Ed for example).
If you have such a stellar form, why would you specifically choose to hide it? The picture would say volumes more than idle claims, and it'd definitely make for enough sway to appear that way in lesbian fanfic. We even already know what your face looks like, so people'd be that much more likely to believe it's not a fake. Above all, it'd be photographic proof that could make people shut up about you being "fat". If you prefer to be seen as "fat", then by all means show no photo.
Why else would you hide it other than to avoid a contradiction?