Discussions focusing on the relation between city and sexuality are rare in social and cultural studies. In this article I argue that the modern city is inherently and inevitably sexualized, and that modern sexuality is largely an urban one. The characteristics of this sexuality are described and discussed in the light of urban life world theory (Simmel, Wirth, Kracauer, Benjamin etc.), sexual constructionist theory, feminist analyses, gay studies and pornography. The particular quality of `sexuality' in urban sexualization is identified along (...) Heideggerian lines as a fundamental ` Gestimmtheit' (`being tuned') of modern being-in-the-world, that is of being-in-the-city. In conclusion, some implications of the intimate relation between city and sexuality are discussed. Thus, theories of everyday life and life world, as well as prevailing idioms of modernist and postmodernist cultural critique, are problematized. Throughout the article, the style and methods of the exposition comment on the problematics concerning the representation of sexuality; and trends towards a `discoursification' of sexuality are criticized. (shrink)