Both forms of pornography generally contains nudity. The niche popularity grew significantly in the latter half of the first decade of the 2000s. Bondage/BDSM Bondage pornography features performers tied up or constrained in various ways. Men may also rub or massage the glans, hentai movies the rim of the glans, and the frenular delta. Female dominance refers to BDSM relationships and BDSM scenes in naked milf which the dominant partner is female. On the other hand, the masochist enjoys being hurt, humiliated, or suffering within the consensual scenario. Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. The use of the word creampie to describe such scenes originated in U. Pornography in Japan is large and intertwined business of adult entertainment with unique characteristics that readily distinguish it from western pornography. Adult animation is genre of animation geared towards adults and sometimes teens. For example, in Australia it is rated Refused Classification . Both sexes sometimes apply lubricating substances to intensify sensation. Double Stuffed , Double Vaginal , or Double Anal pornography involves the penetration of one orifice by two penises or other objects. In 1988, a sex tape caused significant damage to Rob Lowe career. Bear features a combination of middle-aged, hairy or overweight males. Typically featured are hitting, choking, name-calling and hair-pulling. Two women tapegagged and cuffed to iron bars Bondage and Discipline are two aspects of BDSM that do not seem to relate to each other because of the type of activities involved, but they have conceptual similarities, and that is why they appear jointly. Examples of mentally oriented practices gaysex are education games, during which the dominant requires certain forms of behavior from the submissive. The wife who enjoys cuckolding her husband is frequently called a hotwife, or a cuckoldress if the man is more submissive. A homosexual threesome would involve either three men or three women.