According to tradition in the islands of the South Pacific, a woman who wears a flower behind her left ear is signalling she is married, taken or not available for a relationship. A flower worn behind the right ear signals a woman is available, single or approachable.
The tradition of women wearing flowers behind their ear to signal availability is akin to the wearing of wedding rings. A woman wearing a wedding ring on her left hand is signalling her unavailability, just as a woman wearing a flower behind her left ear is signalling she is in a relationship. This custom makes it easy to determine which ladies are single and which are taken.