Unless you’re ‘older’, or really into retro music formats, you may not recognize the term ‘B Side’. The old 45 rpm single records had two sides to them. The A Side was the primary song expected to be the money-maker. The B Side was more ‘filler’ – a song of lower quality, less interest, experimental or whatever. For the most part, the B Side was rarely listened to and most people couldn’t tell you what was on the B Side of their favorite records. A notable exception to this was the Beatles, who often had hit songs on both sides.
Back in the 1970s, a group called Three Dog Night, for whatever reason (out of ideas, no songs written, or just being creative), actually released a song on the B side called “Our ‘B’ Side”. Yes, it was a humorous take on the second side song practice, but it was a fun song nevertheless. If you are interested in hearing it, check out this link: https://www.youtube.com/watch?v=o0lMo3nm3JM