Specific sex acts Anal Anal pornography features anal penetration with a penis, dildo, other objects, or some combination of them. Some are aroused from wetting their diapers, others like messing their diapers. The term bondage describes the practice of Physical restraining. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. The naked appearance of actress Demi Moore in the advanced stage of pregnancy on the cover of Vanity Fair magazine in 1991 marked the beginning of a period which has since seen pregnancy presented by celebrities as a glamorous state of living, while also creating a market for photographers to produce images of pregnant mothers, and for fashion stylists to introduce pregnancy styling to their business. Mutual masturbation, mutual manual stimulation of the genitals between partners, can be a substitute for sexual penetration. Both sexes sometimes apply lubricating substances gay twink porn to intensify sensation. A person may be sexually penetrated multiple lesbian hentai times simultaneously. Cartoon pornography includes, but is not limited to, hentai and parody renditions of famous cartoons and comics. In Japan, point of view pornography is referred to as hamedori . Lying face down on a comfortable surface such as a mattress or pillow, the penis can be rubbed against it. Felching is a sexual practice involving the act of orally sucking semen out of the vagina or anus of one partner. A spanking may be carried out with the use of a bare or gloved hand, or with any of a variety of implements, including a paddle, strap, hairbrush, feather duster or belt. In the West, masturbation in private or with a partner is generally considered a normal and healthy part of sexual momporn enjoyment. In the gay pornography industry, which uses amateurs as well as professional actors, the term gay-for-pay refers to actors labeled or believed to be straight but who engage in same-sex sexual activities for money. Women with women Main article: Lesbianism in erotica: Lesbianism in contemporary pornography Lesbian or girl-girl pornography features women engaged in sex together, but is typically aimed at a male audience.