"Max Don't Have Sex With Your Ex" is a song recorded by German Eurodance act E-Rotic, released in June 1994 by Blow Up as the group's debut and lead single from their first album, Sex Affairs (1995). Written and composed by David Brandes, John O'Flynn, and Felix Gauder, the song hit success in Germany where it peaked at number seven. In the Netherlands, it reached number four while in Austria, it reached number 12. It also peaked at number 14 in Switzerland and number 20 in France. The song is the group's highest-charting single in the United Kingdom, where it peaked at number 45 on the UK Singles Chart in June 1995.