Why do women really like sex? "....

Tell me what you think. I have some conclusions of my own, and I'm speaking from some experience. I have slept with a few women, most of them, I would say were normal. But most of my knowledge in this area is from conversations. I am married, and my wife and I talk openly, but a lot of my knowledge comes from my sisters. (I have three) And NO, they don’t talk TO me about these things, but they often have talked AROUND me, and are comfortable around me to be open in this area. I have never asked them this question, (that would be a little too far for a brother to go). I also have female friends and co-workers who I listen to. Not ease-dropping but open conversations among friends.
I got some conclusions from different points of view and here they are. They are listed in order of what gives women the most desire, IMO.

1 There is a deep seat drive in women to have vaginal sex, because it is needed for pregnancy. Even if the woman isn’t trying to get pregnant, the drives are still there.

2. It makes her partner happy, and she gets lots of attention and is treated better than she would be otherwise.

3. She gets lots of emotional validation during love making.

4. Its fun and something that they can do together.

5. It feels good and provides orgasm.

Anyone disagree, or care to comment? Girls would you like to put your own order of importance. Be truthful, don't tell us guys what you think we want to hear.