I think you'd all be quite amazed how popular this little kink is. There is enough demand for umpty-hundred dollar belts and devices to keep a half-dozen manufacturers of bespoke equipment in business (with months' long waiting lists). And as with anything like this there are a hundred different motivations and flavours of it.

Oooh, I'll take mine in wood grain, that is stylish.

Mine suffers from Claustrophobia, so no way says Jose..

Won't it just poke out from under his pants, and make it look like he has a boner the whole time?

testicles go through the ring, then the front piece is attached. i guarantee the top buyers will be fraternities.

the middle one looks like the storm tropper model

I am particularly perplexed by the camouflage one. Actually all of them, but I guess that one in particular.
jill
http://inbedwithmarriedwomen.blogspot.com

How does it stay on? Does it have to be bolted to the person?

Men will find a way to f*ck it.

Ummm… boners?