Funny story, at least I think so. :) I played Pop Warner football way back. We were practicing and a kid walked up to the coach. Practice stopped and we turned our attention to them. The kid asked if he could play. The coach said yes but you need a parents consent form and an athletic supporter. The kid asked, "Can my dad be my athletic support?" We laughed and went back to practice. Not sure how coach dealt with that one.
Reminds me of a line from Grease, "Pep rally tonight. Even if you are not an athlete, come out and be an athletic supporter."
I prefer to be naked when I can be or commando when I have to be clothed. On occasion I will wear a jock strap to do something different since I like the feeling of my penis against my body and the feeling of my exposed butt. I was introduced to the jock strap in 7th grade P.E. Class and wore one through 12th grade. It was much later in life that I became interested in buying a jock strap for some additional fun when I could not be naked.
Where can you wear a jock strap and not be naked?
We had to wear jocks starting in 7th grade PE class.
We were told that they were required to provide the support needed to prevent injury. That was repeated from 7th grade through 12th grade. However, they never specified what injury might happen if a jock was not worn.
I've gone online looking for the medical reasons for wearing a jock -- same story -- to provide the support required during physical athletic activities. But never anything specific.
The only real use I've ever found for a jock is while riding a unicycle. A jock keeps your cock and balls pulled to the front and up -- so you don't end up sitting on them. That could be very painful. Tight jeans also work well.
Other than that, my opinion on jocks is essentially the same as for any other piece of clothing -- if I don't have to wear it, I'm probably not wearing it.
Nude when possible; commando when clothing is required.
I own about a dozen jocks, different brands and materials. Some are the old school Bike type jock, and I find them all comfortable.
I tend to work outside, so if the temperature is 50 or higher, I find the jock preferable in keeping cool and dry over other types of underwear. Commando is not always possible at work.