"Women Wonderful" Effect
The "women wonderful" effect, or "women are wonderful" effect, is a result of the fact that women are generally viewed more positively than men.
This is probably that, on the whole, women are more associated with positive social traits (being nurturing, showing care and love, etc) while men are more often equated with aggression, danger, and harm. This could possibly be a behavioral artifact reflecting a person's relationship with their mother and other female relatives.
For instance, in public women are perceived as being more approachable and less-threatening than men.