The documentary was partly based on a survey of 2,700 gay and bisexual men in Britain conducted earlier this year. LONDON (Thomson Reuters Foundation) - A popular party drug is being used to rape comatose gay and bisexual men at “chemsex” parties, their assaults then streamed online, according to a British documentary that airs on Sunday.Ī joint investigation by BuzzFeed News and Channel 4 Dispatches found that GHB, a drug used to heighten sexual pleasure, is regularly used to “sexually assault gay men” with footage of the rape broadcast live on the dark web.