Animal life has a rule: when the environment becomes unsuitable for survival, animals will reduce their reproduction on their own. In the end, humans are still a kind of mammal.

In a survey five years ago, among young people aged 18 to 25, about 20% of men reported having had casual sex, and the figure for women was 17%. But five years later, in the same age group, the number of men dropped to 8%, while for women, it was only about 4% $SOL
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