Hhhm. To me, that is more taking the piss out of the ridiculously idealised, photoshopped to hell, Demi Moore style pregnancy posing that goes on. I don't find it particularly funny, but nor do I find it upsetting.
What I do think is interesting is how rarely we see a man posing naked. And how rarely men are photographed in such a passive pose. If they are naked or semi-naked it is for a reason - diving in tight shorts, surfing, etc.