They most certainly were not.

There is no netflix and chill without birth control. We take birth control for granted now but the dynamics are so different if casual sex leads to children. It is an insane practice for both parties without birth control and isn't a thing.

We didn't have that figured out as a society and then we got both the internet and birth control.

Don Giovanni is supposed to be a myth about a guy sleeping with a 100 women because the idea was so crazy just a few generations ago.