This is a design request to you engineering types!
Years ago, I had a photographers remote release cable that had a 30 second timer. I taped it to the simple metal release clip for my enema. I was into punishment enemas and self bondage. This allowed me to tie myself up, then push the photographers release cable and 30 seconds later the enema would release.
That gizzmo broke years ago. I would like to replace it with something more modern. I wish to be able to set the enema up, prepare myself then trigger the timer, which would trigger the release a short time later (30 seconds to a few minutes.)
Extra points if I can have a second such device (or linked in series) that would drop a set of handcuff or padlock keys to me say 30 minutes later.
Ideally the device would be run by battery current, rather than AC wall outlet. (AC electricity & water & enemas not a good mix,)
I suppose a mechanical timer would be fine too, if it were reliable.
I know this sort of thing can be done since my car alarm has a timer that locks to car doors and sets the alarm after 30 seconds.