Like all women people, they are driven by their moods at any particular time. Moods can change at the drop of a hat and are extremely variable.
Most times money can override a mood, but not always.
Timing, patience, and perseverence is key and a guy must be ready to strike when the iron is hot, without delay.
This is most pertinent with civies and amateur SA gals but also often applies to the pros.
Moderator note: I fixed this for you.