I have had a very small number of female lovers in my life. I was a late life awakening bisexual. I am not flat, in the "brick shithouse" end of thic, and from that wheelhouse let me tell you that I have had a lesbian lover who was flat as a board. In her case it was due to a double radical mastectomy which is the reason she is not dead to breast cancer. She was lovely, and together we explored how I found her body type to have a beauty mine did not. There isn't one beauty standard, we aren't copies.
There are different esthetics. As an Anime girl, I have to default to weeb speak. There are two schools, Flat is Justice, and Oppai is Truth. Fashion models ever since Twiggy have been flat like pancake, and make styles look elegant that make me look like a water balloon. I have big boobs, big ass, but you know what, the rest of me is to scale. I have shoulders like I was born to swing an axe (which I frequently do at Girl Guide camps) and legs like I am planning on dragging a reluctant cow to market by hand. I can't do Jane Seymour, Michelle Pfieffer thin ethereal beauty, I am never going to be like Iman or Grace Jones. They have that thin graceful beauty like fine china or a delicate blossom.
I do earthy, motherly, and the nose art off a WWII bomber. I can't ever be your kind of beautiful. I can admire it. I have cherished the chance to love it, but I could starve myself to death and still never be it.