i've been trying to get back into running. I cant say i wear short shorts due to rubbing but i've found out a swim jammer works well like these
http://www.ebay.com/itm/Seobean-New-Swim-suit-Mens-Bikini-Swimming-Trunks-Swimwear-Jammers-/322061362121
would like to run in a speedo brief but i'd be rubbed raw after the 1st mile or 2.