Who designs underwear?

So the majority of "tighty whitey" underwear is of the form where two overlapping pieces of material seem to be present to cradle your scrotum. However, in actual use, my sack invariably "falls out" and ends up exposed to the roughness of whatever pants I happen to be wearing at the time.

I avoid this issue typically by getting those "bikini briefs" which are pretty effeminate, and therefore less desirable than "manly underwear" but at least there is no room for ball escape. They are also difficult to find at times, and when I travel I just replace underwear with new ones to avoid washing.

So, am I "doing it wrong", or were they truly designed by retards and never improved upon?