As a model, swimwear was one of the first types of "sexy" clothing Shudufhadzo 'Shudu' Musida felt comfortable in.
Before that, she dealt with the same insecurity most women face when preparing to put on swimwear; less fabric in the garment equals less of a symbolic security blanket to cover the bits you might not necessarily want people to notice.
Bits like your stomach, some love handles, or that thing your back does that no one else has ever noticed.