prepky: well for the most part I wear boxers, polo and izod, seem to do the trick..it helps that they have the little split at the leg, which helps to keep everything from getting all twisted up in there, If i do wear briefs I have found that CK offers a larger pouch on their hip brief, and 2xist has a good size pouch as well...except for their sport brief (OUCH, no room at all, was spilling out everywhere....)