The book "Packing for Mars" by Mary Roach discusses the design choices behind the condom-style urine collection device used in EVA suits. It highlights that the device comes in only three sizes: L, XL, and XXL. This decision was made to prevent astronauts from mistakenly choosing a smaller size due to embarrassment, which could lead to uncomfortable situations during space missions.

By eliminating the small size, the designers aimed to ensure that astronauts would have a more reliable and comfortable experience while in space. The focus on practicality reflects the unique challenges of life in zero gravity, where even basic bodily functions require careful consideration and planning.