Schaffner likens the Beatles' 1966 recordings to the moment of transformation in the film "The Wizard of Oz", "where, when Dorothy discovers herself transported from Kansas to Oz, the film dramatically changes from black-and-white to glorious technicolor". The album appeared a year before psychedelic drugs became a phenomenon in youth culture, and it was the source of confusion for the group's more conservative fans. A female writer later complained in "Beatles Monthly" that 1966 represented the end of "The Beatles we used to know before they went stark, raving mad". In this way, "Revolver" marked the start of a change in the Beatles' core audience, as their young, female-dominated fanbase gave way to a following that increasingly comprised more serious-minded, male listeners.