I always thought it was a warning against the adverse affects of extasy. Being a techno artist, Stephan is no doubt exposed to use of Extasy on a regular basis. The real hint here is "Feel the need for love grow stronger." That's one of the key affects of X. The point of the song is that if you keep using X, it'll use up all your serotonin and rob you of your ability to be happy. Then you're left with only paranioa.
I always thought it was a warning against the adverse affects of extasy. Being a techno artist, Stephan is no doubt exposed to use of Extasy on a regular basis. The real hint here is "Feel the need for love grow stronger." That's one of the key affects of X. The point of the song is that if you keep using X, it'll use up all your serotonin and rob you of your ability to be happy. Then you're left with only paranioa.