In September, an eight-month investigation by BuzzFeed News and Channel 4 Dispatches found an "epidemic" of drug-fueled gay sex in Britain.
The epidemic came with an array of harmful consequences: addiction, violence, sexual violence, overdose, death and suicide. But it's not just a British problem.
The combination of sex, crystal meth and GHB (gamma-hydroxybutyrate, sometimes just known as "G"), which has been called "chemsex," is intensely addictive.