I was thinking about this after browsing for some new trousers online, all of the low cut/wider bottoms and cropped tight fitting tops. Reminded me of being 16 and everyone was insanely self conscious about their belly or hips. I recall this style working well for pear shapes with the longer torso and shorter legs, whilst hourglasses often felt 'fat'.
Since then we've had the skinny bottoms trend with baggier, longer tops, which shifted our attention a bit to something else (thighs! ankles!).
There's been a huge acceptance of all bodyshapes in the past 20 years, and I wonder if this return to bare midfiffs will spark any self consciousness again. Maybe not? I was always slim but felt huge in those styles because I have longer legs and a short torso, so my hips aren't all that far from my boobs. I didnt like the skinny jeans trend and am glad it's lost some power, but the new styles seem to rely upon very tight or cropped tops to balance out well. I suppose I will be staying somewhere in the middle (slim cuts, mid rise), and am not arsed about trends these days, but it does bring back memories!
I do think that changing fashions emphasise some body parts over others, and it's the luck of the draw if it suits us.