[analyst74]

This is the logical conclusion if you don't understand another country and solely base your analysis on data.

All you said in regards to male/female ratio is true, and single women have lots potential mates to choose from.

Unfortunately, the mistress situation is still common, due to a variety of issues around limited supply of wealthy men, divorce laws favouring the wealthy, societal stigma against divorced people, social norm of judging men by success and women by look, etc, etc.

Not all those issues are female-centric, but combined, they make it acceptable (while still looked down upon, if advertised) for some women to be a mistress of some powerful man, and powerful men to have mistresses.