Women love cats. Men say they love cats, but when women aren't looking, men kick cats. A woman knows all about her children. She knows about dentist appointments and soccer games and romances and best friends and favorite foods and secret fears and hopes and dreams. A man is vaguely aware of some short people living in the house.
Women look nice when they wear jewelry.
A man can get away with wearing one ring and that's it. Men use restrooms for purely biological reasons. Women use restrooms as social lounges. Men in a restroom will never speak a word to each other. Women who've never met will leave a restroom giggling together like old friends.