Particular areas and processes of the body that change during pregnancy may also become the focus of psychological investment, but nudity or sexual activity is not always essential, and in some cases actual pregnancy is not necessary to invoke arousal. The volume of semen that is ejaculated depends on several factors, including the male health, age, degree of sexual excitement, and the time since his last ejaculation. The industry generally refers to such films as adult films, which videos gays is part of adult entertainment. Certain websites have begun providing bondage videos and photographs featuring the kidnapping roleplay, which has been largely the hallmark of detective style bondage magazines. Kurt Wild, who appeared as a bottom in Lucas Entertainment Gigolos, is married to a woman and has three children. 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. As a form of non-penetrative sex, it can be done for its own enjoyment or as foreplay. For a foot fetishist, points of attraction include the shape and size of the foot and toes , jewelry , treatments , state of dress , odor, and sensory interaction . Coprophilia , also called scatophilia or scat milf xxx , is the paraphilia involving sexual arousal and pleasure from feces. When the interest in a particular subject is obsessive, the behavior may be described as stalking. The hentai videos glans itself may widen and lengthen as the stimulation continues, becoming slightly darker in colour, while the gliding action of the foreskin reduces friction. The warm sensation felt when urine trickles on the body seems to give very relaxing and pleasurable feelings to the person. Additionally, the buttocks give an indication of the shape and size of the pelvis, which impacts reproductive capability. It is geared towards heterosexual men, who most typically define a threesome as such. Internal ejaculation shots are a comparatively recent development in pornography; they are not found in early pornographic films.