The Right Kind

I wore my red briefs when I ran the other day because it was a "first time." I always wear my red briefs when I do a new thing. Last year, for example, I wore them for my root canal, on the trampoline at Bob's, etc. But what is the right kind of underwear for my future runs? I understand and accept the running magazines' silence on this issue. Indeed, for many people not only the issue but that whole region is very private.