When I'm being chased by the Masturbation Monster my aim is to chuck everything I can into it's path as I beat a hasty exit out the door! Anything that makes it more difficult to act out helps. Hence porn filter, distractions and the belt itself. I mean nothing is totally secure, but it all helps. It's often more of a question of making "escape" just a little too much effort for you to bother.
I used a combination key safe a whole lot, using an app to do time-locking. After this I used to wait for my partner to open when home from work. That led on to occasional lock ups that were longer than I intended and an increasing degree of making me wait. Of course when I got to the full 24 hours, the key is just for emergencies really.