I don't think birth control explains much of the difference, since usage of hormonal birth control in North America and Europe is only up ~2 percentage points s

I don't think birth control explains much of the difference, since usage of hormonal birth control in North America and Europe is only up ~2 percentage points since 1994 [0]. A potentially larger factor from the medication angle is antidepressants - usage of those is up ~10 percentage points over the same time frame, and decreased libido is a common side effect of many of the most frequently prescribed antidepressants. (I think this is probably also a minor factor compared to cultural explanations, but I'm mentioning it for the sake of completeness.) [0] https://www.un.org/development/desa/pd/sites/www.un.org.development.desa.pd/files/files/documents/2020/Jan/un_2019_contraceptiveusebymethod_databooklet.pdf https://www.un.org/development/desa/pd/sites/www.un.org.deve...