Group sex also occurs in populations of non-human animals such as bonobo apes and chimpanzees. Preggo pornography features pregnant performers and may include erotic lactation gay boy porn as a fetish. The act may be carried out face to face, or head to tail, with the woman recommended to be on top if she has smaller breasts. Felching is a sexual practice involving the act of orally sucking semen out of the vagina or anus of one partner. Contrary to the other two types, B/D does not define the Tops and Bottoms itself, and is used to describe the general activities with either partner being the receiver and the giver. This is commonly called double vaginal penetration or double stuffing. Bukkake is a sex act portrayed in pornographic films, in which several men ejaculate on a woman, or another man. It contains graphic sexual activity and visible penetration. 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. In contrast, a celebrity may take the route of openly releasing horny milfs the tape and benefit directly from royalties as well as indirectly from the publicity. Gay pornography is the representation of sexual activity between males. Breast fetishism is hentai porn a paraphilic sexual interest focused on female breasts . A study of 164 males in Finland from two SM clubs found that 18.2% had engaged in coprophilia; 3% as a sadist, 6.1% as a masochist, and 9.1% as both. 18% of heterosexuals and 17% of homosexuals in the study pool had tried coprophilia, showing no statistically significant difference between heterosexuals and homosexuals. In recent years, however, many celebrities have benefited from the publicity resulting from the release of a sex tape. The use of the word creampie to describe such scenes originated in U. Creampie pornography features ejaculation inside the vagina , mouth or rectum instead of the common cum shot, followed by the visible seeping or dripping of semen from the vagina, mouth or anus.