Trivia: If you look carefully at the beginning, Lucy is reading McCall's Magazine, and "I Love Lucy" is on the cover.
Pregnant Women Are Unpredictable - S2-E16
Trivia: When Lucy's reading the book about infant care, she's holding a baby doll wearing a bonnet in order to learn how to bathe and diaper a baby, and the doll she's using is not just any prop. It's actually one of the show's endorsed products named the "I Love Lucy Baby" doll, which were sold in stores.
Trivia: Right after hiring the maid, when Lucy's sitting on the couch she's reading Companion magazine, and on the cover of this issue there's a small inset photo of Lucy, Desi, and Desi Jr. This magazine is seen again in "Lucy Wants New Furniture" when she has dinner set up in the living room, and is waiting for Ricky to walk in. (00:12:50)
Ricky Has Labor Pains - S2-E19
Trivia: When Ricky tells Lucy to sit down and rest before the "surprise" baby shower, Lucy opens a McCall's magazine and on the cover it reads "I Love Lucy" though the cover has been altered a bit. This issue of McCall's is from January 1953, and the cover actually reads "Why I Love Lucy, by Desi Arnaz", which includes the article that was written by Desi. (00:05:15)
Ricky Has Labor Pains - S2-E19
Trivia: After Lucy's baby shower, one of the gifts she received is a baby doll in a box lying on the couch, that Ricky picks up and smiles at. The actor has a reason to smile, as this doll is the "I Love Lucy Baby" doll which came in a box that had a small drawer with accessories, and was sold in stores. (00:09:30)
Answer: According to Snopes.com, there is no definitive answer, but the mid-1960s is the most verifiable date with "The Munsters" being cited as the first, although others claim "The Brady Bunch" showed the first couple seen in a double bed. An early TV show from the late 1940s titled, "Mary Kay and Johnny" is also thought to have shown the married couple's bedroom as having a double bed, although probably not with them in it. However, this was when TV was aired live, and there are no surviving episodes, only anecdotal accounts.
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Something that is funny is that in the movie "A Christmas Story," they show the parents having two twin beds in their bedroom. In a real situation, they should have shown them having a double bed. Lucy and Ricky had twin beds pushed together in an early episode, which would have been pushing television boundaries in that time.