Do guys in their 30's wear briefs?

They are like mustaches, older and younger people wear them but nowadays they are a reminder of father figures. In my teenage years I switched to boxers and nowadays boxer-briefs or sport trunks for working out.

Yes I am 33 and still wear white fruit of the loom briefs. There is nothing wrong with it. You need to wear what is comfortable.

Not me. I didn't even know they still sell them.

Boxer-briefs since 1995ish... once they were invented.

Your definitely not but I think its say most older men wear them?!?!?