is it ok to wear briefs at 13 years old?

Of course it is, many guys your age wear briefs, they are comfortable and look good, carry on wearing them.

Wear what you're comfortable wearing. Briefs get a lot of mockery, but that's just silly. I've dated guys that preferred briefs over boxers. Why not give boxer-briefs a try?

It's fine..

Wear boxer briefs if you want the support and not get criticized when going to the gym.

Age has nothing to do with what style of underwear you prefer. You can wear briefs until the day you die, or decide to go with boxers tomorrow. Whatever works for you, personally, is the best choice.

yeah wear whats comfortable or try boxer briefs

Of course it is! There are many younger people wearing briefs nowadays, and rightly so! They're so much better than boxers in so many ways - they're cheaper, more supportive, more comfortable, better-looking, better at hiding erections, and they don't ride up.

Yeah its okay imma girl and i wear briefs and boxers

Once your comfortable its fine.

It is good. I don't like boxers either.

Underneath trousers - Yes, over the top of trousers - questionable.

wear whatever you are comfortable with, and to h*ll with what anyone thinks