Water Polo/Diving queries

[Swimmboy]

I suspect water polo players prefer brief suits because they spend much of their time doing 'egg-beater' kicking, where the legs move in a circular pattern so they can hold position near the guy they are covering. That leg motion is very different from swimmer kicking, so jammers reaching almost to the knees would likely restrict that circular leg movement. At some meets where you see swimmers wearing jammers, you will see a breaststroker wearing briefs because the breaststroke kick has an inward-outward circular motion and for some guys, the brief suit is more comfortable.