Cock-squeezer...

yet a CBT toy from my hand.*S*

Here you have the original sketch. It's been adjusted a little along the way, but it is the original idea..*S*

 

This is the final outcome, with the topside up (left) and with the bottom-side up (right).

And the locking-bracket.

 

The squeezer, assembled, from two different angles.

Here the locking bracket has been mounted, and locked...

The purpose of the squeezer is, of course, that it will squeeze the cock, tightening the ball-sack in the process.
How tight you'd like it, is of course your own decision (or the decision of your Domina)..*G*

Here you'll get a 'mounting-guide':

1/ Start by pulling you ball-sack through the opening in the top half, where the long screws are.

2/ Next you pull your cock through the same hole.

3/ Place the bottom part onto the screws.

4/ Pull your ball-sack slightly through the opening in the bottom half.

5/ Screw the wing-nuts loosely onto the ends of the screws.

6/ Now tighten the wing-nuts until you (or your Domina) is satisfied...

7/ Mount the locking-bracket onto the ends of the screws, once you have adjusted the wing-nuts, so that their 'wings' fit into the opening of the locking-bracket.

8/ Finally you lock the padlock through the hole on top of the locking-bracket. Now you're inescapably 'locked in'..!

-a tip for the Dominas out there: If the wing-nuts are tightened to provide just so much pressure, that he's barely feeling any pain (for now), he will surely feel (a wonderful lot of)  pain, once he (tries to) get an erection..*gnarling*