Hentai is the various forms of Japanese pornography, including H-manga, H-anime, and H-computer games. Rough sex pornography is similar to pornography featuring sadomasochism, and typically features a Top who humiliates videos gays and/or degrades a Bottom while being physically violent towards them. Insertion in pornography features women inserting various odd objects into their anus or vaginas. Heterosexual bareback sex, as opposed to sex with condoms, not only poses an increased risk of STIs, but for pregnancy as well. Mutual masturbation can be practiced by males or females in pairs or groups with or without actually touching another person as indicated by the following examples of contact versus non-contact scenarios: Non-contact mutual masturbation Two people masturbating in the presence of each other but not touching. Unlike erotic films, pornographic films contain explicit sexuality and do not claim any artistic merit. Clothed female, naked male is a genre of erotica featuring one or more nude men and one or more clothed women. The related term twinkle-toes, which implies that a man is effeminate, tends to be used in a derogatory manner. Pornographic films present sexual fantasies and usually include erotically stimulating material such as nudity. Transsexual people Transman pornography features performers who were born female and who porn milf medically transitioned to male. A somewhat controversial ejaculation control technique is to put pressure on the perineum, about halfway between the scrotum and the anus, just before ejaculating. A crush fetish is a fetish in which one is sexually aroused usually when someone crushes objects, food, and sometimes small animals with their body, usually under their foot, or when crushed oneself. Interracial pornographic films have experienced an explosion in popularity, becoming one of the fastest-growing and biggest-selling hentai movies genres. Saliva pornography involves salivation and saliva. Bisexual DVDs sell much better online than in adult video stores, possibly due to customers in stores feeling embarrassed to buy them.