Stumbled upon this on a womans health web page:
Keyhole Incontinence: the strong sudden urge to empty your bladder when you get to the front door and place the key in the lock.
This is a result of you training yourself to empty your bladder as soon as you get home. Over time, just the sound of the keys or the door unlocking can trigger your brain to relax. This relaxation results in your bladder getting ready to go, and you may wind up going before getting into the restroom.
The key and lock is a metaphor used in stop bedwetting hypnosis files. This looks like it could be used in reverse for just the opposite.
WOH