Aware that the main effort of analysis and speculation here would be focussed on Cracky, or on the Cracky-like figure, in the photograph, I have considered it wiser to devote my own researches to the banana.
I can confirm that, quite regardless of whether Cracky here really is or is not Cracky, the banana definitely is a banana – specifically, a banana of the common “Yellow Cavendish“ variety which came, in the course of the 1950’s, to displace the formerly dominant “Gros Michel” in most of the world’s banana-producing regions.
The noticeably yellow-greenish pigmentation, as opposed to the typically vivid yellow one of the great majority of supermarket-sold fruit of this sort, suggests that the particular banana in this photograph was naturally tree-ripened and is not, like most supermarket bananas, a product of the more commercially advantageous artificial-ripening process. This in turn would suggest that it was purchased in a store specializing in organic products – a datum which may form a valuable basis for hypotheses bearing on the socio-economic position in which Cracky – or (admittedly, a less significant potential finding) this Cracky look-alike – currently finds herself.
The angle at which the young lady is holding the fruit in question deviates significantly from that generally acknowledged to be the optimum angle for the purpose of the actual ingestion of fruit of the genus musaceae. The conclusion seems inevitable, then, that the photo was not the product of mere accident (for example, of a sudden epileptic spasm of the left arm and hard, which happened at the time to be holding a small digital camera, while she paused for a quick snack in the vicinity of a mirror) but rather some sort of deliberate mise en scène, intended to get across a specific (possibly sexual) message.
Obviously, further research will be required before this last, highly speculative supposition can be given the form of an actual scientific hypothesis.