In either case, you'll be looking for a tool that won't just hand you (or them) a little control, but inescapable, securely locking, stainless steel control. This is that tool.

From the Blue Line collection, the Total Submission Cock Cage features a simple design easy to get into, but not so easy to get out of (without permission, that is). In extra firm, temperature sensitive steel, the Cage fully and completely surrounds the entire shaft and head. If you're in the mood to be generous, you can unscrew the top to reveal the tip.

To get it on them, or yourself, apply some lube to the cock in question, and gently pull your testicles through the ring before bending your (non-erect, please!) shaft downward into the cage. A classic padlock and two keys are included - keep at least one of the keys in a very safe place, since the padlock isn't a type you can easily pick.

In body safe stainless steel, the Blue Line Total Submission is easy to clean using warm soapy water or a good toy care fluid/foam, and it can also be boiled or bleached for more thorough sterilization. 

* The Blue Line Total Submission Cock Cage measures about 4"/10.2cm long and it's about 1.4"/3.64cm at widest point. Scrotum ring measures 1.9"/4.8cm