With second wave feminism and growth of scholarship in women history and sexuality in the 20th century, the definition of lesbian broadened, sparking a debate about sexual desire as the major component to define what a lesbian is. However, the tradition of bondage magazines continues in the form of art books of bondage photographs, published by mainstream publishers such as Taschen. In September 2003 the BBC reported on hot gay sex the new dogging craze. Participants usually derive pleasure from this, even though many of the practices—such as inflicting pain or humiliation or being restrained—would be unpleasant under other circumstances. It is also often mixed with other fetishes in practice, such as voyeurism, denial, etc. A large part of the popularity of these videos is seeing how regular and normal the girls are in real-life. However the genre remains a very small proportion of the pornographic DVD market; for example at porn retailer HotMovies. Strictly speaking, bondage means binding the partner by tying their appendages together; for example, by the use of handcuffs or by lashing their arms to an object. Said that the female buttocks evolved in the context of females competing for the attention and parental commitment of powerful resource-controlling males as an honest display of fat reserves that could not be confused with another type of tissue, although T. Twink pornography features younger performers, and usually features young men lesbian milfs under 30 who identify as gay or bisexual. Voyeur or peeping Tom pornography is usually more staged with the subjects lesbian hentai aware of the cameras, sometimes openly including this exhibitionist awareness. High heel pornography involves women or men dressed in high heeled shoes. Various groups within society have considered depictions of a sexual nature immoral, labeling them pornographic, and attempting to have them suppressed under obscenity and other laws, with varying degrees of success. Unlike erotic films, pornographic films contain explicit sexuality and do not claim any artistic merit.