If you have Netflix, Christine Amanpour (formerly of the BBC, now of CNN) has a series on sex and love around the world. It’s quite good. The first episode is in Tokyo, in a country were 40% of all marriages are sexless! The series goes on to New Delhi, Beirut, etc. The common theme is that Colonialism and/or orthodox religiosity screwed up cultures that were once hotbeds of sexual freedom. Amazing what happens to cultures when sexuality is repressed. Especially for women.
In China, the male child takes care of the parents so many female fetus were aborted. There are more men than women of marriage age in China and it has become a problem. It is estimated by 2020 there will be 24 million males of marriage age that will remain bachelors because of the lack of marriageable females.
Men go to work while many women go to university /college so many women are better educated than the men. Dating has gotten so selective for the women that often a man has to have a sizeable bank account, a nice place to live, a dece3nt and stable income and he has to do housework and cook.
In Japan, there are dating services for women that charge the women thousands of dollars (US equivalent) that only have men that have very high incomes and a very stable government job.
In Japan and China it seems like nice poorer guys just give up on marriage type relationships and settle for some paid sex.