Addiction is a disease that targets the brain’s reward system and is the psychological and physical inability to stop consuming a substance or activity, even though it is causing psychological and physical harm. While separately, sex and drugs can both be addictive, Chemsex addiction occurs when a person becomes addicted to the feeling of enhanced sexual pleasure as a result of taking a certain drug or a combination of drugs. Once the brain becomes accustomed to this level of pleasure, the probability of becoming addicted to Chemsex is high.