It depends on the guy and climate. Briefs hold the testicles close which in warm climates can cause low sperm count. If he is running a marathon he might prefer a brief to hold him in tight though. If sperm and testicular health is a concern, talk to a doctor; otherwise, briefs shouldn't cause serious harm.
Spandex or Lycra is the best fabric for buying men's swim trunks as it can be stretched repeatedly and will still snap back to its original shape and length.
Go to FashionTIY, they have a lot of men's swimming trunks.
It's "Trunks" and his last name is Brief
The ISBN of Brief Interviews with Hideous Men is 0316925411.
trunks
krillin
Men who have muscular builds look best in well-fitting briefs, trunks, or boxer briefs. Men who are slim/skinny without much muscle definition look best in traditional boxers. Men who have a bit more weight on them look best in boxer briefs or boxers.
Brief Interviews with Hideous Men has 288 pages.
Brief Interviews with Hideous Men was created on 1999-05-28.
Men wear trunks. They're like shorts but you can swim in them. Women wear a bikini and something that looks like trunks.
Calvin Klein creates and manufacturers men's brief swimwear. Various Calvin Klein men's brief swimwear can be found online from numerous retailers such as Amazon.
Men who have muscular builds look best in well-fitting briefs, trunks, or boxer briefs. Men who are slim/skinny without much muscle definition look best in traditional boxers. Men who have a bit more weight on them look best in boxer briefs or boxers.