I probably don't have to preface this by stating: 'this is just a wild guess", but I do so state. It seems to me that lyrics are often obscure when there is a religious cultural taboo or controversy that cannot be expressed without causing some degree of consternation. I wonder if the "red apple juice" could refer to a well-known (but still hotly-debated)event in the book of Genesis which features a man, a woman and an apple (forget the snake, if possible)?

Pace, Josephus