[Aunche]

I don't think this has anything to do with modern dating. Powerful men have had mistresses and before that they had concubines. Now that casual dating is socially acceptable, the tendency for high social class men sleeping with lower social class women is more visible, but it isn't necessarily more popular. The number of sexual partners millennials have is similar to that of Gen X and the Boomers.

Source: https://www.latimes.com/science/sciencenow/la-sci-sn-millenn...