premise: "Paint It Black" (originally released as "Paint It, Black") is a song by the English rock band The Rolling Stones, written by the songwriting partnership of Mick Jagger and Keith Richards, and first released as a single on 6 May 1966. It was later included as the opening track to the US version of their 1966 album, "Aftermath".
hypothesis: Mick Jagger sold Paint It Black to The Rolling Stones
reason: It is unknown how The Rolling Stones acquired the song Paint It Black