Okay, so chemsex is when grown-ups use drugs like crystal meth, cocaine and mephedrone (that they should not be using) to have sex with other grown-ups. It’s not safe or healthy to use these drugs because they can hurt your body and mind, and it's not good to have sex with people you don't know or without taking safety precautions. It's important for adults to make safe and smart choices when it comes to sex and drugs, and to remember that their health and safety always come first.