The niche popularity grew significantly in the latter half of the first decade of the 2000s. Among swinging couples, one of the two partners is often the driving force and the other is more passive-supportive of the addition of additional sex parties. Threesome can also refer to a love triangle, a three-way romantic relationship. There is, however, no third party camera work involved. Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography videos gays involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions. Some may keep their hand stationary while pumping into it with pelvic thrusts in order to simulate the motions of sexual intercourse. Such ejaculation can be done by mammary intercourse, or masturbation over the other person, or result from the withdrawal of the penis from a partner mouth as he is ejaculating following fellatio, irrumatio, or intercourse. Content featuring male bisexuality has been a growing trend since the advent of internet pornography. Yaoi is anime or manga that features gay males . Hermaphrodite, also known as herm, refers to pornography, typically hentai, that features persons with the genitalia of both sexes. Throughout history, women have not had the same freedom or independence to pursue homosexual relationships as men, but neither have they met the same harsh punishment as homosexual men in some societies. Rainbow parties were covered on The Oprah Winfrey Show in 2003, and became the subject of a juvenile novel called Rainbow Party. Macrophilia is a fascination with or a sexual fantasy involving giants, more commonly expressed as giantesses . Hardcore pornography is pornography that depicts penetration or extreme fetish acts, or both. Older names for a pornographic 3d hentai film include stag film, and blue movie. If dramatic skills are not involved, lesbian milfs black gay a performer in a porn film may also be called a model.