Watch Christmas on Earth for Free: How to Stream the Movie Online at 123Movies. . For all intents and purposes, "Christmas on Earth" is a performance art film about genital worshipping. At 29 minutes, Barbara Rubin has created the ultimate study on the celebratory and erotic nature of free-love. The film is tinted in various colors, hence the title, and finds various individuals engaging in sexual activity. Men with women, men with men, women with women, and several orgies throughout.