Mutual masturbation can be practiced by males or females in pairs or groups with or without actually touching another person as indicated by the following examples of contact versus non-contact scenarios: Non-contact mutual masturbation Two people masturbating in the presence of each other but not touching. Individuals who can change between top/dominant and bottom/submissive roles—whether from relationship to relationship or within a given relationship—are known as switches, though the term switch in this context is occasionally seen as derogatory and is rejected by many who might simplistically fit the definition. Using the term shemale for a transsexual woman often implies that she is working in the sex trade. Snuff pornography involves the actual death of any of the participants, gay cock consenting or otherwise, simulated death is not considered snuff. It like associating every Christian with the zealots who cause religious wars. After the prerequisite level of sexual stimulation has been achieved, and ejaculation becomes imminent, the male will position his penis so that the semen discharged will be deposited onto his partner face. A celebrity may allow such a recording to surface willingly, as part of a publicity stunt. 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. These scenes may either have the cameraman directly engaging in sex or merely filming others having sex. As of 2013, little analysis of this paraphilia has been reported in medical literature. The work of Bruce Seven has been called reality porn, due to his lack of using scripts and asking his performers to act naturally in their own character. Insertion in pornography features women inserting various odd objects into their anus or vaginas. They cited the Internet and text messaging 3d hentai as common ways milf xxx of organising meetings. Transsexual porn star Wendy Williams has stated that transsexual porn is classified as Straight Specialty.