A spiritual history based on spirit and full breathers. I think the full breathing and self expression guides many towards this. Was this our statement of freedom and autonomy, like the bra burning of the sixties. They let me breathe. But if you carry a lot of stuff in your pockets, you will be pulling up your pants probably too much for your liking.
Suspenders negate any tension around the belly-breath area.
Better yet, suspenders and a belly bag. I think suspenders on a woman can be very attractive. The belly size will increase a little as the breath fills up near the waist band. To heck with a tiny waste and big chest image of what a man and woman should look like. The belly muscles must work with and let go, not fight against the breath.