Do bikinis like this exist in real life?
I've never seen them in shops or anyone wearing them
.
I can answer this.
Yes, they exist in real life, but not in your typical store that sells bathing suits.
These 'bikinis' only work 99% of the time with surgically enhanced models who hold a practiced pose for the camera. I have put regular women models (beautiful mids) in these bikinis; they look great in the photos but not so good in the studio. In person they are not flattering at all. Women would never wear them in public even if they would wear a regular bikini.
Although I could focus on the challenges of real women and their curves, the bigger issue is actually all of the precise posing over 1000 exposures and all the airbrushing that goes into getting that 1 perfect photo. If surgery can also beat gravity, so much the better.