Fetish cuckolding can have a wide range of expression, from pillow-talk fantasy between monogamous partners to extreme alternative lifestyles, depending on the couple. Anal sex or anal intercourse is generally the insertion and thrusting of the erect penis into a person anus, or anus and rectum, for sexual pleasure. When sexual activity is centered on one of the threesome, then the hentai movies activity may be described as a gang bang of the person. However, the tradition of bondage magazines continues in the form of art books of bondage photographs, published by mainstream publishers such as Taschen. There is also some evidence that pornography can be used to treat voyeurism. Real jail or prison or police station shots or videos may violate laws in some countries. To tea bag is a slang term for the sexual act of a man placing his scrotum in the mouth of a willing sexual partner for pleasure or onto the face or head of another person. Bondage is usually, but not always, a sexual practice. The interaction between tops and bottoms—where physical or mental control of the bottom is surrendered to the top—is sometimes known as power exchange, whether in the context of an encounter or a relationship. The terms can be complimentary or pejorative. Partners can engage in penetrative sex, known as full swap, or choose to soft swap in which they engage only in non-penetrative sex. Well-known female porn stars who expressed their pleasure in pegging their male partners include Taylor Wane, Debi Diamond, Brittany Andrews, and Monique Covét. In some societies, the terms fox, plum, chick, or chicken are preferred. It has been described as professionally made porn which seeks to emulate the style of amateur pornography. While bondage is a very popular variation within the larger field of BDSM, it is nevertheless sometimes differentiated from the rest of this field. Interest in BDSM can range from one-time experimentation to a milf fuck lifestyle. In gay pornographic movies, actors who identify themselves as heterosexual, but who nevertheless perform explicit sexual acts with other males on film do not face the same stigmas as the mainstream acting counterparts and gay bear porn indeed can rise quickly to being featured actors.