Maskulo (Berlin) supports a study by the Institute for Sexology and Sexual Medicine Charité Berlin. The study deals with ChemSex, thus sex between men under the influence of drugs. The aim of the study is to find out more about the social environment as well as about the mental, physical and sexual well-being of men with ChemSex. with the aid of the results of this study die existing treatment programmes for ChemSex-Users will be expanded to support problem-free ChemSex in a better way.