I agree with most of what you say, but there is absolutely nothing you've said that suggests the reading of the song could be any more about a youthful heterosexual first love than it could be about homosexual fist love. Your assumption about the year of the song’ s publication is not convincing enough beyond a shadow of a doubt that you are right. Rather, it is your opinion, and is no more valid that the possibly that it is about homosexual first love. And by the way, who do you think you are by being so benevolent to grant people the right to thing what ever they want. I agree the song lyrics are too cheerful to suggest incest. The song is about a forbidden love, a situation experienced by both homosexuals and heterosexuals alike, so the song belongs to both communities.