You don't understand women.
But that's OK, because women are hard to understand...........even by other women!
At the risk of going into psycho-babble, I believe it's because a woman's strength lies not in rationality, but in intuition and emotional connection. A woman can and does possess a degree of both, but often times she "feels" her way through things and matters. Pleasure and ecstasy - and communicating these experiences - has it's importance in female physiology.
Her gift of emotional connection, intimate communication, and experience for (strictly speaking) sexual ecstasy is something she can teach her mate...........so that he can pay attention to his own sexual experience and communicate what brings HIM to an ecstatic state and closer emotionally to her.
That would be my guess...........but is it scriptual?
Peace,
Mystic