Enduring romantic love is highly significant for our wellbeing, and there is much scientific evidence for its value. There is also evidence that marital sex is important for the flourishing of wellbeing for both partners. Casual sexual relationships and experiences (CSREs) are often characterized in a non-normative way, as sexual behavior occurring outside a committed romantic relationship. However, the prevailing normative description is negative, perceived as superficial behavior that harms our wellbeing. Although sexual activities are linked to many psychological and (...) physical health benefits, these are rarely attributed to casual sex. Instead, scholars and laymen have warned against the negative consequences of non-committed sex, particularly for women. Yet, positive reactions to casual sex, such as satisfaction, confidence, self-knowledge and social engagement, are stronger and more common than negative reactions. Accordingly, the two major aims of this article are to understand the complexity of CSREs better, and to substantiate the claim that in various circumstances, CSREs contribute to our wellbeing. (shrink)