This it because the way a man uses Cancer energy is very different from the way a woman does.
In both cases nurturing is involved but the object is different.
As a Libra woman interested in dating a Cancer male, your astrological love compatibility is based on your Sun Signs alone is fairly average and here's why: Libra, an Air sign ruled by Venus, endows a personality that loves all things beautiful, romantic, artistic and stylish.
Libra women love good manners, great parties where they can flit about the guests as social butterfly and a living atmosphere that's elegant, luxurious and sophisticated.
A Cancer will also love Pisces passionately and will bind emotionally.