Saliva pornography involves salivation and saliva. Matsuo used amateur actresses in his videos, and he usually traveled to their hometowns for the filming. Freud, however, considered such extensions of sexual interest to fall within the range of the normal, unless marked out by exclusivity . Bukkake pornography usually depicts numerous men having sex with one woman, with multiple, usually 10 or more, men ejaculating on the female face. Central to the typical MILF narrative is an age-play dynamic of older women and younger lovers. The first film was released hentai porn in 1980 starring Kay Parker. The buttocks in human females thus contain more adipose tissue than in males, gay bear porn especially after puberty. Fetish cuckolding can have a wide range of expression, from pillow-talk fantasy between monogamous partners to extreme alternative lifestyles, depending on the couple. Transsexual porn star Wendy Williams has stated that transsexual porn is classified as Straight Specialty. Real jail or prison or police station shots or videos may violate laws in some countries. Sadomasochism does not imply enjoyment through causing or receiving pain in other situations . Watersports pornography features sexual activities involving urine, such as golden showers. Currently, animated television series aimed at adults are some of the most horny milfs popular and critically acclaimed forms of entertainment. POV pornography involves camera angles designed to provide the viewer a view similar to that seen by one of the participants, whose face is never shown. Pornography is generally classified as either softcore or hardcore pornography. But starting with The World Biggest Gangbang , starring Annabel Chong, the pornographic industry began producing a series of films ostensibly setting gangbang records for most consecutive sex acts by one person in a short period. Boot fetishism is a sexual fetish dedicated to boots. 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.