If anyone is even remotely like me,
and I'm fairly sure there are more than a few,
I spend some time with myself.
A little too much time with myself, sometimes.
Sometimes,
you need that motivation
to put that thing away.
After experiencing Cal's Curse on different levels, where you want to ask for permission, but you'll feel resistant to it, as well... I realized that I'm constantly torn between wanting to ask for permission... and wanting to ask someone to just tell me to
Put your cock away.
Put it away now.
Clean up, if you need to.
Take a break.
Quit making yourself so horny.
This is the essence of what would probably be a good trigger -- not as much a strict chastity trigger where you have to envision sensations (which is not in my mental repertoire) of pain nor numbness; but to specifically (and simply) not touch it for a while.
I haven't decided, and I think everyone might have a different idea as to what would be a good trigger, but... I think it should have a condition upon it, optionally.
"Put $variable$ away." Put your cock away. Put it away.
"Quit playing with it."
With a modifier.
"Until you wake up tomorrow."
"Until you complete this project."
"Until 2 hours from now."
Perhaps to be self-triggerable.
This came to mind. This could be both a constructive one, if self-triggered, like holding a carrot on a string, dangling a cookie out of reach... and it could be just good enough to be a nice temporary degree of chastity -- a reprieve which doesn't need a specific trigger to unlock, rather, a condition, or simply "until told you may play with it again" -- which one might have to seek a permission for, if no specific conditions are given.