Desire doesn't always come first
The older idea was that desire comes first, then arousal. In 2000, physician and researcher Rosemary Basson proposed a different model based on her work with women in long-term relationships: desire is often responsive. It can start from a neutral place and show up once there's emotional closeness, the right context and touch.
Sex educator Emily Nagoski describes the same idea in Come As You Are. Responsive desire isn't lesser or broken. It's one normal way desire works, in people of any gender.