Internal ejaculation shots are a comparatively recent development in pornography; they are not found in early pornographic films. Bear features a combination of middle-aged, hairy or overweight males. Group sex pornography features at least two men and two women , usually more, who all perform sex acts on each other. However, various groups within society considered such depictions immoral, labelling them pornographic, and attempting to have them suppressed under obscenity laws, with varying degrees of success. It contains graphic sexual activity and visible penetration. This genre also features male-on-male fellatio through a small hole made in a bathroom divider. Cartoon pornography is the portrayal of illustrated or animated fictional characters in erotic or sexual situations. HIV is among the infections that require such direct contact and is therefore very unlikely to be transmitted via mammary intercourse. Portrayals mature milfs of lesbians in the media suggest that society at large has been simultaneously intrigued and threatened by women who challenge feminine gender roles, and fascinated and appalled with women who are romantically involved with other women. Types of anal sex can also be a part of lesbian sexual practices. Certain websites have begun providing bondage videos and photographs featuring the kidnapping roleplay, which has been largely the hallmark of detective style bondage magazines. To avoid gay cock soreness from this resulting friction, some may prefer to use a personal lubricant, masturbation cream or saliva during masturbation. Although there may be no connection between coprophilia and sadomasochism , the limited data on the former comes from studies of the latter. Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. Interactive pornography, available in CD-ROM 3d hentai and DVD format, allows the viewer to select the particular acts performed at any one time, sometimes with the camera providing a first person view.