They wear tight underpants for support and comfort. The "boys" need to be supported to help prevent injury during sports for example.
men wore tight jeans
No. There is no relation between one's decision to wear or not wear underwear, and back pain.
YES
You wear them.
No. But men who wear briefs have lower sperm count than men who wear boxers.
Do you think that they are too tight? Perhaps the pants are too tight when wearing both.
No, it is not!
They wear underpants
On a hot day, it is not okay to wear underpants instead of shorts because there are much better options. It is not morally okay for a man to interchange his underpants with shorts during a hot day. You should wear your underpants beneath your shorts so as not to reveal parts of your thighs to the public.
Yes. There is a Captain Underpants show. It is hosted be Arjit Lal Shrestha. He usually shows in nothing but just red tight underpants. That is his usual outfit while hosting the show.
jepllkjfms kpdemlpidfls jympants underpants is good when you wear them i don't wear underpants
Over underpants and T-shirt/vest. It's usually worn indoors during the summer, but older ('non-professional') Japanese men also wear them outside in their neighbourhood.