Anyone who's been around in the poly community has met, on at least 724 occasions, a married couple looking for a hot bisexual woman to come be their "third."
In the interests of presenting a public service, I've prepared this handy guide to unicorn hunting--a flowchart for people looking for that hot bi babe. You can all thank me later.
This actually popped into my head while I was in the shower this morning, and refused to quit bugging me 'til I did something about it. Clicky on the picture to embiggen.