Lyric discussion by gement 

Not that I object to surrealist interpretations, but the details of this song are so concrete that I'm looking for a real life interpretation as well. I can't find any evidence for Magritte having lived in New York, so "immigrant" is probably poetic license. However, he did several major exhibitions there and had good friends there, according to visual-arts-cork.com/famous-artists/rene-magritte.htm (one of several sources I skimmed looking for this).

They are in a hotel, coming in from a giddy evening with the power elite, losing their clothes, and dancing to the popular music. They're stopping on Christopher Street and looking at the marvels of the New York fashion district. They're just living and being humans together.

The time travel is the same trip all of us are making. When you're old and in a comfortable groove with your spouse, and you look back, what do you find? The music you danced to. The music you fell in love with together. "For now and ever after, as it was before."

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