MaryAnne, I am glad to come back and read this, and you made me crave some chocolate ice cream, so thanks!
I wasn't sure if Cacao was meant to be Cocoa but then I did some checking and saw that it was the same thing basically, so...that clears that up for me :)
This was really clever, and I am sure its metaphorical in sense, about allowing yourself to melt and not be frozen forever because you never know when your last drop will be tasted...if that makes sense.