The Girls Gone Wild series is one example. However, various groups within society considered such depictions immoral, labelling them pornographic, and attempting to have them suppressed under obscenity laws, with varying degrees of success. There are various subcultures under this umbrella term and distinct difference between these subcultures. A related term used in the genre is the term cougar, which implies an older woman as predator. The introduction of the home video and Internet saw a boom in the worldwide porn industry that generates billions of dollars annually. Most bisexual porn is made by small production companies rather than the major studios. Many of these activities might be based on hentai movies rape. In the 18th and 19th centuries, some European theologians and physicians described it as heinous, deplorable, and hideous, but during the 20th century, these taboos generally declined. A heterosexual threesome may involve two men and a woman, or one man and two women - that is, two men having sex with a porn milf woman , or two women with a man. Pantyhose/Tights/Stockings pornography involves women or men dressed in pantyhose, tights, or stockings. By comparison, gonzo pornography puts the camera right into the action, often with one or more of the participants both filming and performing sexual acts, without the usual separation between camera and performers seen in conventional porn and cinema. 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. Threesome or 3some pornography features one man and two women . Unlike smothering, in facesitting the bottom partner is not deprived of air. A spanking may be carried out with the use of a bare or gloved hand, or with any of a variety of implements, including a paddle, strap, hairbrush, feather duster or belt. Contrary to the other two types, videos gays B/D does not define the Tops and Bottoms itself, and is used to describe the general activities with either partner being the receiver and the giver.