Foot fetish pornography features heavy emphasis on the feet of the participants, either in combination with kissing and genital sex or in the context of acts such as trampling or crush fetishism. Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions. Pro-am pornography is sub-genre of amateur pornography hentai sex that refers to professionally made porn that features amateur actors/actresses, often appearing for the first time in a pornographic film. This is commonly called double vaginal penetration or double stuffing. Stimulating the prostate from outside, via pressure on the perineum, can be pleasurable as well. Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. Lolita pornography features women who are 18 years old or slightly older, who pretend to be underage teen girls. The term pearl necklace is used by some because the drops of semen deposited by the man resemble a necklace of translucent white pearls. The strategies and tactics that are used to smuggle one of the couple into and out of the toilet undetected are as important or almost as important as the urination. It is used, for example, at fertility clinics to stimulate sperm donors. Men may also rub or massage the glans, the rim of the glans, and the frenular hot gay sex delta. In academic discourse, racial fetishism is a postcolonialist term found in the writings momporn of authors such as Homi K. In some scenes or relationships it may be impossible for consent to be withdrawn in the middle of a scene, or the bottom may have the ability to revoke consent for a relationship as a whole, but not for a particular scene. Dwarfs or midget pornography features performers who are dwarfs/midgets. Macrophilia is a fascination with or a sexual fantasy involving giants, more commonly expressed as giantesses .