Related
Cock and Ball
Cock Locks
Slave Castration
Electro
CP
Bliss Elevation
Bondage

This is where the slaves is wrapped up in a choice of materials, ranging from plastic wrap, and duct tape, through rubber bandages, and sleep sacks to things such as plaster of Paris body casts. The result is various degrees of immobilization, with their own sensory effects.

Sensory Depravation

If done correctly he looses awareness of his body, and the detachment of self begins. This can also be achieved in meditation (but is less horny :)
You just become the essential you, whenever you gets some 'attention' your senses are far more aware. Much like it is said of blind people and how their other senses compensate.
This awareness is more reactive to things like Electro torture or just light touches.
Because it is subtlety that counts, brash stimulation wipes away the fine definition of the sensations. Much like when those are used to strongly flavoured foods say others are 'tasteless', as they no longer have the ability to distinguish the subtitles they once could.

Note: Loosing the body awareness will not happen is the bondage is too tight to cause numbness in hands etc, that which is too common with novices using sleep sacks.

 

Balls ^

Whatever you choose, to use from Rubber bandages, plaster of Paris or plastic wrap and Duck-Tape, the principle is the same - bind them up good and tight. With rubber bandages it can leaves his balls handing like a boxing gym punch bag, you will find it irresistible not to take a swing at them