The first couple story in the bible: Adam and Eve. It should be enough to understand the female nature.

God gave them the perfect life. They had everything. They were the perfect humans. What else could they possibly want? But guess what, it wasn't enough for Eve! She wanted more.

Women can't be happy and satisfied with what they have. No wonder why they're always reading books about happiness and such.

It will be never enough for them. Always wanting more.

If God, himself couldn't satisfy Eve with everything he gave her, What makes you think that YOU can?