The term BDSM dates back to 1969; however, the origin of the term BDSM is unclear and is believed to have been formed either from joining the term B&D with S&M , or as a compound initialism from B&D, D&S , and S&M. Group sex also occurs in populations of non-human animals such as bonobo apes and chimpanzees. Point of view pornography is adult entertainment filmed to look as if the watcher were experiencing the sex act themselves. 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. The Girls Gone Wild series is one example. The initialism BDSM includes psychological and physiological facets: Bondage & Discipline Dominance & Submission Sadism & Masochism Types of Play This model momsex for differentiating among these three aspects of BDSM is increasingly used in literature today. The term breast fetishism is also used to refer to cultural attention to female breasts and the sexuality they represent, with debate continuing as to whether the modern widespread fascination with breasts among heterosexual males in western societies is a sexual fetish. Locks may be used to emphasize the submissive position or the submissive hands may be fastened videos porno gay above his head to the box. During anal sex, male pleasure can be particularly derived from the prostate, which can lead to an orgasm and ejaculation. Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually to the point gay hentai of orgasm. Hentai narrow Japanese usage and broad international usage are often incompatible. Some people get sexual pleasure by inserting objects, such as urethral sounds, into the urethra , a practice known as urethral play or sounding. 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. Low et al. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy.