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

Do people wear underwear for swimwear? - Quora

Did you think it is possible to swim with underwear on, or does it look weird? - Quora

Should I wear a jock strap or thong with a suit and or tuxedo? - Quora

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

Do guys wear anything under swim trunks? - 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

Can swim trunks be used as underwear? - Quora

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

Can I wear men underwear on my period (I'm a girl) because I heard it has more space and it's more comfortable? Should I? - Quora

Do people wear underwear for swimwear? - Quora

Who wears underwear as swimwear? - Quora