It bugs you till you take care of it.

Lucky they don't play sports naked or you might have something else to ponder

"Excuse me sir/ma'am, I suffer from severe arthritis in my hands and I'm unable to adjust my junk. Would you be willing to make a quick shift for me down there?"

Hard plastic with a rubber or latex edge. They are hot and uncomfortable.

Imagine having to wear a hard plastic bra when you’re doing something physically active—only instead of breast tissue, it’s encasing something that can cause pain that drops you like a stone when it gets pinched. Anyone who’s been vigorously poked in the ovary during sex can surely relate to how important it is to protect your ‘nads, and that the protection is not a sure-fire way to protect them when it shifts because you’re playing a physically active game.

They’re clearly not doing it to show off—it’s self preservation. I think it’s okay to grant them a little grace, isn’t it?

As stated upthread, stuff gets pinched by clothing and moved by activity. Sweat ain't no picnic either.

1. Hang a sausage and a sack containing a couple of eggs between your legs,
2. Put on a pair of pants,
3. Engage in vigorous physical activity.

I'll bet you need to make a few adjustments.

Why does it matter?