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

Is your underwear safe in the pool? - Quora

Can swim trunks be used as underwear? - Quora

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

Can men with incontinence wear the Always Discreet underwear at night, etc.? - Quora

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

Can a man wear spandex briefs, shorts, or square leg shorts? - Quora

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

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

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

What are your thoughts on men's swimming trunks, such as board shorts, in terms of style and comfort? - Quora