That was a cartoon.
Cher claims to be the first woman to expose her bellybutton on tv. Others disagree.
If you ever play trivia and answer The Brady’s you would be counted as wrong.
“Fred and Wilma Flintstone were the first animated married couple ever shown on American television in the same bed together. They have been mistaken as the first couple ever shown in bed together on any American TV show, but that title goes to Mary Kay and Johnny (1947)”.
https://www.imdb.com/title/tt0053502/trivia?ref_=tt_trv_trv