Old TV shows made separate beds a thing for appeals to protestant morality. Prior to that separate beds was a rich people thing. Communal sleeping had been the long standing norm. Commoners didn’t have the space/money typical for multiple beds or even multiple sleeping quarters to make separate sleeping possible.
https://www.bbc.com/future/article/20240111-sleep-the-lost-ancient-practise-of-sharing-a-bed
It also appealed to Catholics who couldn’t use birth control and therefor sometimes remained separated well into their marriage unless they were trying for children.
Old TV shows made separate beds a thing for appeals to protestant morality. Prior to that separate beds was a rich people thing. Communal sleeping had been the long standing norm. Commoners didn’t have the space/money typical for multiple beds or even multiple sleeping quarters to make separate sleeping possible. https://www.bbc.com/future/article/20240111-sleep-the-lost-ancient-practise-of-sharing-a-bed
It also appealed to Catholics who couldn’t use birth control and therefor sometimes remained separated well into their marriage unless they were trying for children.