For some people, non-penetrative sex is the primary sexual activity of choice above all others. 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 . Femdom features BDSM scenes in which the dominant partner is female. The name was coined from the title of the controversial book. 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. Breast fetishism is a paraphilic sexual interest focused on female breasts . Often other friends and community members may witness the signing of such a document in a ceremony, and so parties violating their agreement can result in loss of face, respect or status with their friends in the community. These actors often play the top roles but this is not always the case, such as with Kristen Bjorn and some Bel Ami models. Exhibitionism: Becoming noticeably desperate or wetting oneself with the express purpose of being seen by strangers. A study of 164 males in Finland from two SM clubs found that 18.2% had engaged in coprophilia; 3% as a sadist, 6.1% as a masochist, and 9.1% as both. 18% of heterosexuals and 17% of homosexuals in the study pool had tried coprophilia, showing no statistically significant difference between heterosexuals and homosexuals. Bestiality is illegal in many countries. The term has origins in the Greek language . The glans itself may widen and lengthen as the stimulation continues, becoming slightly darker in colour, while the gliding action of the foreskin reduces friction. Biological anthropologist Helen B. Hermaphrodite, also known as herm, refers to pornography, typically hentai, that features persons with the genitalia of both sexes. Real school shots or videos which are sexualized may violate black gay porn privacy laws in some countries. Such documents have not been recognized as being legally binding, nor are they intended to be.