Redding had developed a reputation for singing sad songs like "I've Been Loving You Too Long (To Stop Now)
." In 1964, he had some fun sending up this image with the song "Mr. Pitiful." In "Fa-Fa-Fa-Fa-Fa (Sad Song)" he does it again, singing, "Sad songs is all I know."
This was far from true - Redding did lots of stompers and could sing with tremendous energy - but it was a great concept for a song about how music can move you, telling a story without any coherent words. Those sad songs can make you feel something deep inside, which is what Redding's brand of soul music was all about.