Anti-pornography psychologist Ana Bridges and colleagues conducted a content analysis of best-selling heterosexual pornographic videos showing that over 96% of all scenes concluded with a male performer ejaculating onto the body of his female partner. The films were financially successful, winning AVN Awards for the best selling pornographic films of their year; however the events were effectively un-officiated and the record breaking claims often misleading. The Japanese sex industry uses the term Paizuri . In September 2003 the BBC reported on the new dogging craze. Scenes of multiple penetration are common in pornography. This is commonly called double anal or double stuffing. Some couples use a threesome as a way to develop a love triangle . With second wave feminism and growth of scholarship in women history and sexuality in the 20th century, the definition milf fuck of lesbian broadened, sparking a debate about sexual desire as the major component to define what a lesbian is. The surfacing young gay porn of sex tapes hentai movies has become so common that some are leaked as a marketing tool to advance or establish a media career. They cited the Internet and text messaging as common ways of organising meetings. As with most forms of sexual activity, anal sex participants risk contracting sexually transmitted infections . The person sat upon may be in bondage, sexually submissive, or simply held down by the body-weight of the other person. Lesbians may encounter distinct physical or mental health concerns arising from discrimination, prejudice, and minority stress. A smotherbox has two openings. A large part of the popularity of these videos is seeing how regular and normal the girls are in real-life. The most common depiction of a hermaphrodite is a person with a female face, breasts, and build, and a penis , although there are other combinations. Buck Angel is the best-known actor in this genre. He talked to them extensively on camera so that both he and the viewer can come to know them before any sex scenes.