He's always shied away from talking about what the track meant, here's his perspective on it:
"I always say, the question is more important than the answer. I sing about what I can't talk about. I sing because there are things I cannot speak. I think it takes away from what I sing and the musicality and the moment of the music to be verbally polemic, and to give verbal footnotes, as in "This should mean this, and this."
We live in a society with an epidemic of declaratives and a poverty of interrogatives, and I think that part of the lasting appeal of "Chocolate Rain" is that question perhaps being allowed to be an interrogative. What is the meaning of "Chocolate Rain?" Some people deduce that it might have a political message or a message about social justice or power, and what I would say is that there are people who would not want to receive a polemic message on those topics, but if they can be brought from not having an interrogative to being in a state of interrogative, questioning, "What is the meaning of Chocolate Rain," I think that's a fantastic outcome."