Wirtualna wycieczka The nipples are erogenous zones, and vigorous stimulation of them during masturbation usually causes the penis to become erect more quickly than it would otherwise. Others may also use vibrators and other sexual devices more commonly associated with female masturbation. The consent and compliance for a sadomasochistic situation can be granted only by people who can judge the potential results. Fistees who are more experienced may take two fists . POV pornography involves camera angles designed to provide the viewer a view similar to that seen by one of the participants, whose face is never shown. Can also black milfs include auto-fellatio, or performing oral sex on oneself. Jail/Prison/Police pornography involves people in police custody or inmates in jails or prisons in various sexual situations, such as strip searches or body cavity searches. As observation is encouraged, voyeurism and exhibitionism are closely associated with dogging. The anus has a relatively high concentration of nerve endings and can be an erogenous zone, and the receiver may receive pleasure from external anal stimulation. However the genre remains a very small proportion of the pornographic DVD market; for example at porn retailer HotMovies. Bukkake pornography usually depicts numerous men having sex with one woman, with multiple, usually 10 or more, men ejaculating on the female face. Kinbaku is a Japanese style of bondage or BDSM which involves tying up the bottom using simple yet visually intricate patterns, usually with several pieces of thin rope . Especially popular in post-World War 2 Japanese culture. In general, softcore pornography is pornography that does not depict explicit sexual activity, sexual penetration or extreme fetishism. Big Beautiful Woman is a euphemism for an overweight woman and is frequently used in the context of fat fetishism. Group sex can occur between people of all sexual orientations and genders. In many cases, that person is also aroused by smelling body parts that have a urine scent.