Such documents have not been recognized as being legally binding, nor are they intended to be. There are various subcultures under this umbrella term and distinct difference between these subcultures. Breast fetishism is a paraphilic sexual interest focused on female breasts . In humans, females generally have more hentai sex round and voluptuous buttocks, caused by estrogen that encourages the body to store fat in the buttocks, hips, and thighs. Works in this genre may explore philosophical, political or social issues. The term has origins milf xxx in the Greek language . The primary subjects of pornographic depictions are pornographic models, who pose for still photographs, and pornographic actors or porn stars, who perform in pornographic films. 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 . The warm sensation felt when urine trickles on the body seems to give very relaxing and pleasurable feelings to the person. 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 industry generally refers to such films as adult films, which is part of adult entertainment. Gonzo pornography is a style of pornographic film that attempts to place the viewer directly into the scene. In the gay pornography industry, which uses amateurs as well as professional actors, the term gay-for-pay refers to actors labeled or believed to be straight but who engage in same-sex sexual activities for money. Barebacking usually refers to a conscious and deliberate choice to forgo condoms. It is also followed by dedicated industry publications and trade groups as well as the mainstream press, private organizations , government agencies, and political organizations. The purpose of this kind of agreement is primarily gay movies to encourage discussion and negotiation in advance, and then to document that understanding for the benefit of all parties.