“Context changes how your brain responds to sex” doesn’t just mean “Set the mood,” like with candles, corsets, and a locked bedroom door. It also means that when you’re in a great sex-positive context, almost everything can activate your curious “What’s this?” desirous approach to sex. And when you’re in a not-so-great context—either external circumstances or internal brain state—it doesn’t matter how sexy your partner is, how much you love them, or how fancy your underwear is, almost nothing will activate that curious, appreciative, desirous experience.