This is an average difference between groups. The meta-analysis does not explain why it arises or predict who in a particular couple will want sex more often. Nor does it describe desire on a particular evening: even within one person, it can vary with circumstances and how they feel. A statistical average is not a timetable that libido has to follow.
If desire differs within a couple, a number cannot decide whose level is “normal.” It is more useful to understand where the difference lies: frequency, initiation, timing, tenderness, or feeling pressured. Sometimes partners want different amounts of intimacy; sometimes one person finds it hard to feel desire in the usual circumstances. Those details are better discussed together, without relying on a rule about what a man or a woman “should” feel.