If they have to stand in strange positions to show it to you then they didnt really have one in the first place.
There was some resort or something I was looking at this summer. On their web page was a picture of the back of a woman by a pool. She was doing one of those hip out and forward things to create a little walnut cheek on the right and on the left she just transitioned from back to leg. I couldnt help but to wonder why they thought that advertising buttless women would make people more likely to stay there.
I don’t know if you go to a gym nowadays, but all the girls wear yoga pants and do glute bridges. It’s a bar across your lap, your back on a bench, and you thrust up. They’re all building asses all the time.