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

What is the best men's underwear for humid weather? - Quora

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

When did you start wearing swim briefs? - Quora

Do people wear underwear for swimwear? - Quora

Do people wear underwear for swimwear? - Quora

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

Why don't men widely use bikini briefs for swimming? - Quora

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

When did you start wearing swim briefs? - Quora

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

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