In this post from December 2018, I wrote out the guitar part and noted that a short phrase in between a C major and an A minor (first at ~0:50) is the same (albeit an octave lower) as a short phrase in between a C major and an A major (at ~1:43) in "I Don't Want to Know" (I wrote out that guitar part in September 2016). The two phrases have the same rhythm and fall in the same place in the measure:
Yester-day, I was thinking about this similarity again, and I realized that these two songs were recorded at the same session, on 25 November 1964. This similarity is still a rather trivial point, but now I know that the songs are closely connected chronologically.