The fetish jockstrap could simply be a classic Bike #10 jock due to it's ultra-masculine connotation and connections to sports and locker rooms. Likewise, military and army jockstraps conjure up images of bunkers, testosterone and male bonding.
In the leather fetish scene, leather jockstraps are often worn by themselves or under chaps becoming part of a uniform.
Then there's Nasty Pig. Their jockstrap creations with their symbolic pig logo represents a raunchy street attitude are a fetish unto themselves, a badge of honor even.
Role playing and image go hand in hand with the fetish jockstrap and are often a status symbol. Whole scenes in the gay community have been built around the jock strap.