I remember the episode of MTM when she goes on a date, then comes home the next morning in her going out on a date dress. I was still a young girl, but I do remember being shocked. Even at that age, I understood the implication. Apparently, a lot of people were upset about it.
https://www.nytimes.com/2017/01/25/arts/television/mary-tyler-moore-show-moments.html?_r=0