Deep Insights on the Potty

First thing in the morning, I take Oscar to the bathroom to use his potty. I sat with him this morning, humming a tune stuck in my head. He asked me what I was singing. I said I didn't know what it was called, I can only remember two lines which I sang for him, "It's been a long time coming...but change gonna come." It's a slow and sorrowful tune. He hung his head and said "Can't go back home." Did he pick up on the sadness of the tune? I don't know, but it seemed like an awfully grown up response for a 2.5 year old.