Swinger parties may involve various group sex activities. The people involved in a threesome may have any combination of gender and sexual orientation. However, gay pornography in the modern world is mostly concentrated in the making of home videos , cable broadcast and emerging video on demand and wireless markets, as well as images and movies for viewing on the Internet. Key party A key party is a form of swinger party, in which male partners place their car and house keys into a common bowl or bag on arriving. Erotic spankings are commonly combined with other forms of sexual foreplay. Group sex also occurs in populations of non-human animals momsex such as bonobo apes and chimpanzees. It is also referred to as anal–oral contact and anal–oral sex, or colloquially as rimming or a rim job, and may be performed by or on people of any sexual orientation for personal pleasure or as a form of erotic humiliation. In the Diagnostic and Statistical Manual of Mental Disorders , published by the American Psychiatric Association, it is classified under 302.89 – Paraphilia NOS and has no diagnostic criteria other than a general statement about paraphilias that says the diagnosis is made if the behavior, sexual urges, or fantasies cause clinically significant distress or impairment in social, occupational, or other important areas of functioning. Nevertheless, it is only an attempt at phenomenological differentiation. Female masturbation involves the stroking or rubbing of a woman vulva, especially gaysex her clitoris, with an index or middle fingers, or both. Shotacon : Similar to Lolicon, this genre involves prepubescent or under-aged boys between the ages 6–12. Pantyhose/Tights/Stockings pornography involves women or men dressed in pantyhose, tights, or stockings. It therefore has the connotation of being wild, dangerous, and fun. According to columnist Dan Savage, the person whose scrotum is being stimulated is known as the teabagger and the teabaggee is the one giving hentai movies the stimulation: A teabagger dips sack; a teabaggee receives dipped sack.