The practice of requiring school swimmers to wear speeds or similar tight-fitting swimwear is often done for practical reasons related to swimming performance. The streamlined shape of the swimwear reduces drag in the water, allowing for faster swimming times.

As for the no-shirt rule, it is also related to performance. Wearing a shirt can create drag in the water and slow down a swimmer. Additionally, shirts can also create problems with hygiene and can become heavy and waterlogged, further impeding performance.

While some individuals may feel self-conscious about wearing speedos or showing their hairy legs, it is important to remember that swimwear is designed for functionality rather than fashion. Additionally, many swimmers find that they become accustomed to the attire and the benefits it provides to their swimming performance.