As an amendment to the woman's previous posting [36538], I submit that beyond dispute, biologically & naturally, the female of our species exists by nature, to instinctively complement and aid a man's needs, which also occur as nature intended thus ; as found in several intense, biopsychological studies, a woman has powerful and very sensitive receptors specifically indicated for the network of subliminal signals afforded in a man's ambience. Her capacity to process these signals conveys how intense the man's need to mate is.

To follow, the mind & psyche do their work in tune with the brain's biochemical processes toward directing behavior.
These processes, combined with the woman's aforementioned intrinsic nature, serve as the trigger or instruction for her behavior. Her cycle of ovulation could well be the final step toward achieving the mating routine.
To that point, how nature indeed controls our reproductive capacity.