What is the role of intimacy in sex? The two culturally dominant views on this matter both share the implicit assumption that sex is genuinely intimate only when connected to romance, and hence that sex and intimacy stand in a contingent relationship: it is possible to have good sex without it. Liberals embrace this possibility and affirm the value of casual sex, while conservatives attempt to safeguard intimacy by insisting on romantic exclusivity. I reject their shared assumption and argue for a necessary connection between intimacy and sex, in that sexual activity as such aims at a specific form of intimacy, irrespective of whether it takes place in casual encounters or romantic relationships, and the difference between good and bad sex consists in whether this end is attained. To defend this view, I develop a general account of intimacy and apply it to isolate its specifically sexual form.