Why boys wear underwear under swim trunks? To hide the outline of their penis with wet trunks?

I was at a waterpark and noticed almost all teenager boys wear underwear under their swim trunks (boxer briefs or under armour, usually the waistband is visible). Never noticed before, but my friends told me it's pretty common among boys, they believe because otherwise with wet trunks the outline of their penis become visible, and to contain boners. Is it the reason? boys answer!
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Most Helpful Guys

  • The only reason that kinda makes sense is if you are borrowing a friends swim suit. That way your body isn't touching their swimsuit and you would get poop streaks in their swimsuits crotch. It is just considerate. I think the biggest reason though, is because they are following the crowd and some idiot decided at some point this is a good idea. The other reasons are so that if your Swimsuit comes down at some point then you don't expose yourself and because they don't want to be nude in the locker room and so they keep their boxers on so they don't have to look at other guys crotches or expose themselves to other guys crotches because this is seen as gay when in grade school. This stuff for me was just in grade school.

    It is very uncomfortable and silly. Your crotch overheats if you are not in the water all the time it feels like a furnace down there and it takes forever to dry. Like probably an entire day, so you feel like you are sitting in a puddle of your own filth if you don't change your underwear right afterwards. Then again, why do we wear swimsuits at all anyways? The best way is bare. You dry within seconds and it feels natural, bikinis can be even more sexually stimulating than just going bare. The swimsuit industry has made a fortune on people with a product that nobody needs and is probably better off without.

  • Its a combo of things its nice to prevent chlorine burn, also I hate the feeling of my trunks sticking to my legs and it cuts down on that. I could care less about people seeing my penis

    • so without underwear trunks stick on your legs/penis?

    • Yeah suction from getting out of the water basically makes them skin tight. Watch a guy get out of the water some time and you will probably notice him grab his shorts and tug at them. Its not full proof but it one less area for your shorts to stick to so it helps a little. I always wear my clothes a little baggy though so it bugs me pretty bad.

Most Helpful Girls

  • yea, that's the reason! My boy used to work in a waterpark and always wore compression shorts under swim trunks. With all these girls almost naked it's inevitable to have an erection sometimes (i'm not jealous, it's just a natural reaction you can't control), and with wet trunks alone you'd see everything and it'd be really awkward!

  • underwear or speedo/tight trunks? my bf sometimes wore 2(!) swim trunks.. to hide his boner

    • *swim trunks

    • you mean he wears square cut speedos (the ones cut like boxer briefs) under swim trunks?

    • yes, he got them for his swim club back then. he used them after he got a huge boner from making out with me.. and girls saw his boner when we walked around and giggled.

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  • Omg... Well I've just learnt something new today! lol :)

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What Girls & Guys Said

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  • Lol, boys do that? Never knew. Haha

  • I usually go for the trunks with the built in netting, but I have a couple of pairs which don't, so I don't usually where them. Might actually be a good idea to wear underwear under those pairs, as it keeps ones privates under control. When I say under control, I am not talking about people seeing it or boners, but I am talking about the flapping around like an angry bird lol.

  • If you get an erection you can hide it better XD

  • Depends on the swim trunk. Some have this really uncomfy inside so we wear boxers under them. Other trunks are just fine without boxers.

    • so in the first case you wear loose boxers or boxer-briefs under swim trunks? coz loose boxers look really uncomfortable...

    • Personally I only wear boxer briefs. In my opinion loose boxers are indeed uncomfortable so I don't have any of those.

  • That sounds like a style trend. No I've never worried about the outline and don't think I've gotten a boner at a waterpark lol.

  • I would never do that. Sounds like a significant increased chance of a skin infection down there :X

  • Some boys do it because they are still shy in the changing room, and just don't want to be totally naked in front of other guys. When I'm changing at the Y, it's an adults only changing room and you don't see that kind of shyness.

  • to make sure no one can se boner heheh
    lol

  • There may be a couple reasons, like I didn't wear underwear under my trunks until I got older, but that's also due to me purchasing larger trunks. My assumption would be either style, or to hide the area right under the belly.

    • so now you started wearing underwear? why?

    • Because I began to wear bigger trunks, and the 'older guys' were doing it. I was around 11-12 when I started doing it I'm assuming. To me it's mainly a style thing since I'm not really self-conscious about my body.

  • I don't. But then again, I don't mind women seeing my cock through my shorts or naked. I like it, I have nothing to hide.

  • Its just a polite way. There are more ladies who feel offended by seeing random boners than there are guys who are embarrassed of having them.

  • Well we are at a water park with a bunch of hot girls/guys so for some of us it is kind of embarrassing if you've got a freaking boner or if you hit the water wrong.

    • so it helps to contain boners? does it work?

    • Yea it works, otherwise we wouldn't bother.

  • For me if my swim trucks fall off during a ride or while diving in the water I have a back up.

    • so do u wear boxer briefs under swim trunks?

    • Sometimes I do, but if I do not have another pair of dry briefs to change into then I do not.

  • I do it so that if something happens then I still will be covered

    • do u wear boxer briefs or compression shorts under them? what the most comfortable?

    • boxers and sometimes compression shorts when im in the water boxers because when i get out they won't give me a wedgie

  • Haha I didn't know boys do that

  • Personally I don't wear anything under my trunks. A lot of boys do because they get embarrassed about getting erections and the outline of their penis showing.

  • During swimming in gym class I would just tape my dick to my leg it was uncomfortable as fuck :(

    • so you wore underwear to keep in place your dick?

  • I never knew that, I wear nothing under my trunks

  • Because the trunks that have the liner inside rub on us all day and cause a painful rash after a while... plus letting every girl in the park/beach see the outline of our dick could be awkward

  • Yes boners for men can be pretty embarrassing and helps avoid the outline.. Some may have other reasons but majority of us.

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