jock strap?

[Kotaro]

what is a jock strap sorry if this is a syupis question

[YourFriend]

This thread doesn't belong here. Though, i can still answer it. Jock strap is a type of underwear worn by guys who do some kind of sport so that their dick and balls can be controlled. Though i find them totally pointless and i can't see how they could be better than briefs.