Today, pornographic films can be sold or rented on DVD, shown through Internet and special channels and pay-per-view on cable and satellite, and in adult theaters. Today, religions vary in their views of masturbation; some view it as a spiritually detrimental practice, some see it as not spiritually detrimental, and others take a situational view. Following the introduction of the Motion Picture Association of America film rating system, independent animation producers attempted to establish an alternative to mainstream animation. Pro-am pornography is sub-genre of amateur pornography that refers to professionally made porn that features amateur actors/actresses, often appearing for the first time in a pornographic film. In contrast, a celebrity may gay boy porn take the route of openly releasing the tape and benefit directly from royalties as well as indirectly from the publicity. However, various groups within society considered such depictions immoral, labelling them pornographic, and attempting to have them suppressed under obscenity laws, with varying degrees of success. Common positions include lying on back or face down, sitting, squatting, kneeling or standing. Some aspects of the research community distinguish between female ejaculation and what is colloquially known as squirting or gushing. Breast fetishism is a paraphilic sexual interest focused on female breasts . Spanking can be administered in a number of spanking positions. John Stagliano is considered to have started the gonzo pornography nude milfs genre with his Buttman series of films. Some masturbate only using pressure applied to the clitoris without direct contact, for example by pressing the palm or ball of the hand against underwear or other clothing. Is also common of hentai porn the furry genre. In the fetish cuckolding subculture, it is most common for the female to take on the sexually dominant role and the male the submissive role, however, female subs, sometimes referred to as cuckqueans, also exist. Participants who exert sexual control over their partners are known as dominants or tops while participants who take the passive, receiving, or obedient role are known as submissives or bottoms.