It’s a myth that women don’t want sex as they age, study finds
https://edition.cnn.com/2020/09/28/health/sexual-desire-older-women-study-wellness/index.html
I guess the difference on viewpoints about sex between Asian women and African women can affect the future fertility rate between Asian nations and African nations.
So far, the difference on fertility rate between Asian nations and African nations derives from economic background. But, after economic growth in Africa, I guess the difference will be more dependent on the different viewpoints about sex.