The nude celebrities effect is to give the viewer the sense that they are experiencing the porn milf sex acts that they are watching, as opposed to simply watching others as a voyeur. Especially popular in post-World War 2 Japanese culture. 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. Male masturbation may differ between males who have been circumcised and those who have not. As in B/D, the declaration of the Top/Bottom may be required, though sadomasochists may also play without any Power Exchange at all, with both partners equally in control of the play. One is in a vertical side of the box for the neck of the person who has their head inside the smotherbox. In general, softcore pornography is pornography that does not depict explicit sexual activity, sexual penetration or extreme fetishism. The person sat upon may be in bondage, sexually submissive, or simply held down by the body-weight of the other person. Bukkake pornography usually depicts numerous men having sex with one woman, with multiple, usually 10 or more, men ejaculating on the female face. Along with the penis, the scrotum is sensitive and considered to be an erogenous zone. It is also often mixed with other fetishes in practice, such as voyeurism, denial, etc. There is also some evidence that pornography can be used to treat voyeurism. In many cases, that person is also aroused by smelling body parts that have a urine scent. A variant of this is known as ATOM or ATOGM where the insertive partner removes hentai movies his penis from one recipient anus and inserts it into a second recipient mouth. In D/S, the Dominant is the Top and the submissive is the Bottom. Pegging is a recently invented word which features a woman penetrating a man with a strap-on dildo. One-sided male nudity can also porn cartoon arise when a male disrobes as part of a male striptease. A facial is a form of non-penetrative sex, though it is gay bear porn generally performed after some other means of gay sex video sexual stimulation, such as vaginal sex, anal sex, oral sex or masturbation.