The object or situation of interest is called the fetish; the person who has a fetish for that object/situation is a fetishist. Cuckold fetish pornography that involves a cuckolded husband. The concept of lesbian, to differentiate women with a shared sexual orientation, is a 20th-century construct. Comic books often featured characters being tied up and tying others up, particularly in damsel in distress plots. In some scenes or relationships it may be impossible for consent to be withdrawn in the middle of a scene, or the bottom may have the ability to revoke consent for a relationship as a whole, but not for a particular scene. The definition milf xxx clash also appears with the English definition of yuri as any lesbian relationship, as opposed to its sexually explicit definition in Japan. A few extremely flexible males can reach and stimulate their penis with their tongue or lips, and so perform autofellatio. Hardcore pornography is pornography that depicts penetration or extreme fetish acts, or both. Lucky Pierre is slang for a person performing both receptive and insertive anal and/or vaginal sex simultaneously during a threesome, being positioned between the two partners. A variant of A2M is ATOM where a performer inserts his penis directly from one recipient anus into a second recipient mouth. Rainbow party A rainbow party is an urban legend spread from the early 2000s. There gay sex video may be more than two participants; both group sex and gang banging can be included. For much of the history of cinema and television, lesbianism was considered taboo, though since the 1960s it has increasingly become a genre in its own right. Incest pornography can feature actual relatives, but the gay hentai main type of this pornography simply uses actors of similar looks to suggest family relationship. Cuckolding can also be mixed with other non-monogamous relationship arrangements with which it has substantial overlap such as Swinging, wife-swapping, open relationships, and polyamory, etc. Specific sex acts Anal Anal pornography features anal penetration with a penis, dildo, other objects, or some combination of them.