Erotic literature and pornographic films have been devoted to the sexual uses of glory holes. It may involve sexual attraction to women who are pregnant or appear pregnant, attraction to lactation, or attraction to particular stages of pregnancy such as impregnation or childbirth. Cum swapping pornography involves performers trading semen between their mouths. For their consent, they must have relevant information at hand and the necessary mental capacity to judge. Solo pornography features performers masturbating. Cartoon Network has dedicated a late night programming block to adult animation, known as Adult Swim. Exhibitionist pornography features performers, milf xxx usually female exposing themselves in public and spans simple flashing to public sex. Social attitudes towards the discussion and presentation of sexuality has become more tolerant and legal definitions of obscenity have become more limited, leading to an industry for the production and consumption of pornography in the latter half of the 20th century. Softcore pornography generally contains nudity or partial nudity in sexually suggestive situations, but without explicit sexual activity, sexual penetration or extreme fetishism, while hardcore pornography may contain graphic sexual activity and visible penetration, including unsimulated sex scenes. This is also the case in many relationships not considering themselves as gay movies sadomasochistic; lesbian hentai it is considered to be a part of BDSM if it is practiced purposefully. It may be regarded as taboo or unnatural, and is a criminal offense in some countries, punishable by corporal or capital punishment; by contrast, people also regard anal sex as a natural and valid form of sexual activity that may be as equally fulfilling as any other desired sexual expression. Making a pearl necklace is one of the activities that sex workers use as safe sex alternatives for people who refuse to wear condoms. Fantasies of group sex are extremely common among both men and women, and group sex is a subgenre in pornographic films.