Sado-masochism is a form of sexual activity involving actual or simulated pain so as to enhance sexual pleasure. Various forms are common, including at the gentle end of the spectrum back scratching during intercourse, through corporal punishment (spanking) and flagellation, ranging to the use of devices such as nipple clamps, whips, and more severe forms of pain. It should be emphasised that the whole point of sado-masochism is not of pain, but of pleasure for all (usually two) parties involved. The popular misconception that sado-masochism is about hurting one's partner is a naive fallacy. Rather, due to the complex nature of the relationship between pain and pleasure centres in the brain, many people find a little pain during sexual intercourse enhances their pleasure - for example having their back scratched. Generally, parties involved in sado-masochistic sexual activities enjoy both the dominant and receptive roles, and may also partake of other associated sexual activities such as bondage, slave and master games, humiliation and so on. Flagellation as a means of sexual activity, either solo for masturbation or with other parties has been practised for thousands of years, and was formerly (and may still be) very popular with religious recluses and monks. Under current UK law, any form of sado-masochistic sexual activity partaken of between consenting adults, in private or otherwise is illegal, and constitutes assault (the law stating that one cannot consent to assault unless in a sports scenario, such as boxing). Research Sado-masochism