What exactly is the purpose of compression shorts over regular briefs, or even a jockstrap? Compression shorts seem to provide just as much support for the male parts as any of the alternatives, but they have more fabric down the legs. Are they to keep one's legs warmer in colder weather? Or just as an additional modesty covering to the leg when wearing shorter running shorts and the athlete doesn't want loose shorts flopping around their legs? I was thinking at one time they are to prevent thighs from rubbing together, but i see guys with skinny legs wearing them too.