I talked to a woman without pierced ears who said that she couldn’t wear diamond earrings -because clip-ons could never be trusted.
Today’s invention is therefore earrings which emit a sound when they are detached from one’s ear.
The two metal sides of the clip could be made to act as switch contacts in a circuit with a watch battery and a beeper. This would ensure that the wearer became instantly aware of losing one of her earrings.
These devices might even incorporate a sound chip so that earring-tones could be individualised.