The following explanation can be found at Norwegian Wood (This Bird Has Flown) - Wikipedia, the free encyclopedia
The lyrics of the song sketch an encounter between the singer and an unnamed girl. They drink wine in her room and talk into the night. However, at 2 A.M. the unnamed girl ceases their flirtation, which the speaker may have been hoping to end in consummation, declaring "it's time for bed", leaving him to crawl off to "sleep in the bath" alone. Later, still early in the morning, the singer finds that the girl has left him for another or out of insincere love, so the singer lights a fire and sets blaze to the unnamed girl's house as a final act of revenge.
"Norwegian Wood" refers to the cheap pinewood that often finished the interiors of working class British flats. The last verse states that the singer lights a fire, the implication being that the singer in fact sets fire to the girl's flat, presumably as revenge for not sleeping with the singer.
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