Shhh. We're stalking the most elusive of creatures, here in the steamy jungles of Craigslist. Yes, I'm speaking of the legendary bisexual female. Of course, there are several variety of bi-F, and many can be found at watering holes, cafes and Osento.
But the mythic bi-F, those rare few interested in being the 'guest star', 'third wheel', 'girlfriend' with an established couple, well, that's a sub-species that can make a biologist's career.
Even today, no one quite knows how this species behaves - what motivates them, how do they reproduce, how can they be lured into displaying their beautiful mating behavior in one's bedroom. How does the 'bi-curious' behavior differ from the more established 'bi.' Do they enjoy wine and 420? Does a hot tub interest them? It's a mystery.
Markings from several of these rare creatures were sighted on Craigslist, but the predominance of '23 year old bi Asian hotties' led some researchers to be suspicious and there is some evidence that these were frauds posted by Big Dave in IT to throw us off the trail.
More recently, CL causal encounters has been experiencing a cyclical overpopulation of prostitutes, men looking for 'the ladies', and men wanting to fuck on stairs. This has led to an increased scarcity of bi-F sightings and some fear they may have become an endangered species.
Nevertheless, brave researchers such as myself (and my wife) continue in our quest. Using solid science, phermone therapy, witty postings, and Photoshop-enhanced "pics" as bait, we wait, and wait...