Swim Jock question

[Dooley67]

I used to wear a swim jock many years ago, like 35 years ago, when I occasionally wore swim shorts that look like today's board shorts. The jock was much more narrow than a regular jock with a very narrow waistband. The shorts were unlined and needed a swim jock just like today's boarders need a speedo underneath them. But then again, today, why wear a speedo underneath board shorts, just wear the speedo!

D67