Honestly, people recommending boxers clearly don’t have big balls and/or loose ball sack. Boxers are the opposite of what is needed to prevent this problem — jock straps, or underwear that has a big enough pouch to contain the balls without constricting, will help tremendously. You want to keep your thighs from sticking to your ball bag— that’s the key— and also, don’t shave anything (let it ALL go natural) and that will also help. Your bush, the hair on your ball bag, and hair on your thighs are there for a reason- to keep the sweat from puddling on bare skin.