Are you supposed to wear underwear under men's swim trunks? If so

Do people wear underwear for swimwear? - Quora

Is it acceptable for Indian Men to wear brief underwear for swimming at resorts, hotels or any public pools? - Quora

Brazil: Do Brazilian men usually use swimming trunks or briefs (in Portuguese, sunga) at the beach? - Quora

Do people wear underwear for swimwear? - Quora

Is it good to wear briefs to swim? - Quora

Is your underwear safe in the pool? - Quora

What type of underwear do gay men prefer the most? - Quora

How to stop my dick outline from showing when I leave the pool in swim trunks - Quora

Are you supposed to wear underwear under men's swim trunks? If so, which type? - Quora

How long should men's swim trunks be? - Quora

Where online can I find patterns for men's swim briefs? - Quora

Who wears underwear as swimwear? - Quora