Perhaps one of my favourite garments is the one-piece swimsuit. The combination of polyester and elastane provide a pleasing figure hugging silhouette. Smaller breasts tend to become more streamlined, but at a certain point, larger breasts are able to distend the forgiving fabric further, and provide a certain natural swell and buoyancy with the extra mass they afford. With motion, a bigger bust often carries a pleasing momentum too, as the boobs playfully slosh and sway with the give of the material.
One of my earliest memories of such things involved the modest over-stuffing of an occasionally worn swimsuit, resulting in a pleasing squish of flesh around the armpit, and a taut appearance around the bustline. It was no where near the size of our protagonist here, but with a little imagination and exageration, you get the idea. The garment is sng and taught enough to provide a handsome plump cleavage and under-arm spill, yet there's still enough give to allow the mesmerising jiggle and sway with each step.
Of course, another favourite of mine is Boob Envy. It's a very real thing, and there is nothing compares to seeing a girl who thinks she has large breasts, suddenly being heavily out-boobed by someone significantly larger. There's a moment of realisation that not only all of their boasts, but also complaints about their size are somewhat put into perspective by a stronger, more resilient female. There's also a lot of strength in being proud of your differences, and letting people look or point - there's a good chance you may be in a position that a lot of other people envy...