This guy clearly needs to be restrained!
Ropes or chains?
A good tight hogtie or a stretched out spreadeagle?
Should he be gagged, hooded, blindfolded, earplugged?
What should he wear? Tight soccer shorts? Skintight rubber shorts? A skinsuit? A wetsuit? Nothing?
Maybe he should be stripped and tied to a chair…
…blindfolded and then silenced with a large ballgag…
…further ropes should be added to increase his bondage…
…and then he should be left to suffer in silence.
How would you restrain him?
Heavy Bondage 
Totally naked, bound spreadeagle with ropes. Nothing else, I want to enjoy his screams, and have him enjoy his torture too, both visually and orally.
totally naked, etc…but occasionally with steel restraints.