https://www.amazon.com/Why-Women-Have-Sex-Everything/dp/0312662653
Read this.
Most women do not enjoy the sex, but
1. the power over the man
2. the attention from the man
3. the attraction from the man to secure/protect her and gib monies
4. show off the male to her friends
5. bind a valuable male to her will
6. get pregnant from a superior male
7. pleasure (but vibrators are seen as superior over most men)
8. laziness - just spend some time
A few women are indeed horny and want sex just like men, maybe 5% of women or so (I cannot remember the exact number, but it was low).