Maybe it seems a little racy going commando-style, which most people know is not wearing underwear. However, most men’s running shorts are outfitted with an internal “holder” which substitutes for underwear and prevents flopping around.
Though I like to dress warmly during the cold months, on warm summer days, it’s more comfortable to rely on the built-in holder. As well, some running short styles are pretty short, and your underwear could show, which I don’t think is fashionable.
When I was younger, all running shorts were short, so it was common to go commando. However, occasionally some problems came up.
Over time, the elastic bands in the holder become less taut, and on occasion it fails to perform. Since most running shorts are made of thin and light material, when this happens, flopping occurs, and it can be obvious.
This has happened to me a few times, and I’m faced with the difficult choice of putting my hands down my shorts to make an adjustment, or just riding it out.
If I’m in a somewhat secluded area, an adjustment is quick and easy. I’m reluctant to fiddle inside my shorts if I think people can see, so usually I’ll keep running until I come to a good spot.
Someday, however, perhaps it’ll become fashionable to run commando in shorts that don’t have the internal holder. In that case, because of my experience, I won’t have much trouble adapting to this new style.