The person sat upon may be in bondage, sexually submissive, or simply held down by the body-weight of the other person. Although pornography has usually focused on heterosexuality, due to the prevalence of the heterosexual orientation, explicit gay material has a long history as well, which reaches back to Greek antiquity, if not to prehistory. In the hentai porn context of consensual erotic activities, sadism and masochism are not strictly accurate terms; there is a significant difference from the medical or psychological usage of both terms. Voyeur or peeping Tom pornography is usually more staged with the subjects aware of the cameras, sometimes openly including this exhibitionist awareness. With second wave feminism and growth of scholarship in women history and sexuality in the 20th century, hot gay sex the definition of lesbian broadened, sparking a debate about sexual desire as the major component to define what horny milfs a lesbian is. 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. Along with the penis, the scrotum is sensitive and considered to be an erogenous zone. Bukkake videos are a relatively prevalent niche in contemporary pornographic films. Now facial cumshots are regularly portrayed in pornographic films, videos, magazines and internet web sites. While most tentacle erotica is animated, there are also a few live-action movies. Cum-shot pornography features a collection of male ejaculation scenes. Another variant of reality pornography consists of normal couples that are filmed by professionals, in which case the only obvious distinction from amateur pornography is the higher quality of production, filming and editing. The Japanese sex industry uses the term Paizuri . Arousal may be triggered by seeing the body movements or facial expressions of that person. A variant of this is known as ATOM or ATOGM where the insertive partner removes his penis from one recipient anus and inserts it into a second recipient mouth.