I know there's "special" packing underwear you can buy, but I just came across something called "Wonder Jock" by Aussiebum which has a separate pouch in which men are supposed to place their scrotum for a "lift" to make for a larger bulge, or rather, that's the general idea of it...
So, anyone have any suggestions as to any other underwears that seem like they'd be great for packing, even if that's not what they were initially designed for?