The rise of the Internet in the late 1990s and early 2000s similarly changed the way pornography film was distributed and furthermore complicated the censorship regimes around the world and the legal prosecution of obscenity. Threesome can also refer to a love triangle, a three-way romantic relationship. Examples include the Girls Gone Wild and Girls Who Like Girls Series. A survey by the New York City Department of Health and Mental Hygiene found that heterosexual women are more likely to bareback when engaging in anal sex than homosexual and bisexual men. The arousal from being desperate comes from the sensation of having a full bladder. A hentai sex 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 milf xxx is sexually aroused usually when someone crushes objects, food, and sometimes small animals with their body, usually under their foot, or when crushed oneself. Female dominance refers to BDSM relationships and BDSM scenes in which the dominant partner is female. As of 2013, little analysis of this paraphilia has been reported in medical literature. For uncircumcised males, stimulation of the penis in this way comes from the pumping of the foreskin, in which the foreskin is held and slid up and down over the glans, which depending on foreskin length, is completely or partially covered and then uncovered in a rapid gay movies motion. Individuals are also sometimes abbreviated when referred to in writing, so a dominant person may be referred to as a Dom for a man, and a Domme for a woman. Some restrict a policy of panties/nipple tape for females and some allow full nudity with explicit sexual interaction allowed. The genres of pornography are based on the type of activity featured and the category of participants, for example mateur pornography is a category of pornography that features models, actors or non-professionals performing without pay, or actors for whom this material is their only paid modeling work.