I also see it as being the length of the relationship, as in it started in September. She was the September Gurl which maybe was a pet name. Then by December they had broken up. He had to stay away. No gurl. Just December boy being alone, cold dark winter, yada yada. Also it could be "December Boy's got it bad" so it's more singular.
I also see it as being the length of the relationship, as in it started in September. She was the September Gurl which maybe was a pet name. Then by December they had broken up. He had to stay away. No gurl. Just December boy being alone, cold dark winter, yada yada. Also it could be "December Boy's got it bad" so it's more singular.