In The Beatles' 45's collection, there are 3 very strange B-sides.
They did not make it to an LP.
In fact, they were hidden until the 2-volume CD released in the late 90s. ("Past Masters, volume 1 and 2")
On this one, George Harrison plays the sitar and sings. The lyrics are interesting, specially if you are into a lot of philosophy.
The last one is a classic.
It really shows that The Beatles had a big sense of humor. "You know my name, look up my number" was the US B-side of "Let it be". The songs' lyrics are the title over and over again.
The Beatles wrote and recorded many great songs. These are not among them. Yet, they were fun to listen to now that they are available in a digital format!