If I'm not mistaken, a married couple was not permitted to sleep in the same bed under the Production Code. However, right before we see Claudette Colbert writing the farewell letter, we see Joel McCrea sleeping next to an empty spot in his bed. Nice, subtle subversion if you ask me.
"Why do you find it so hard to believe?"
"Why do you find it so easy?"
"It's never BEEN easy!"
That's a minor subversion, compared to the rest of the film.
We could have high times
if you'll abide
I thought the limitation was that you couldn't see two people in bed together? If two people were on a bed, one of their feet had to be on the floor?
Anyway, it was a nice touch to show her empty spot in the bed. Subtle and well-done.
They couldn't show a man and woman in bed together. They didn't.
And thats how they got it around the code.
Now, if the code said that you can't show an 'empty spot' and a man/woman in bed together, they would have been in violation.
There was apparently another way a man and woman could be in bed together--they had to be fully clothed and on top of the covers.
Two examples of this, interestingly enough occur in two Jimmy Stewart movies: Made For Each Other (1939) and Born to Dance (1936).