The netting found in men's swimwear serves a few purposes. Firstly, it provides support and helps to keep everything in place while swimming. Additionally, it functions as a form of modesty by providing an extra layer of coverage. The netting also aids in quick drainage and drying by allowing water to pass through easily. However, personal preference plays a role, and some individuals may choose to remove or cut out the netting for added comfort or to wear their own undergarments.