What Beatles song is about the Maharishi Mahesh Yogi?

“Sexy Sadie” is about the Maharishi. John Lennon wrote it after getting disillusioned with Maharishi Mahesh Yogi during that trip to India. The original title was literally “Maharishi” — they changed it to avoid a lawsuit. The lyric “Sexy Sadie, what have you done? You made a fool of everyone” was aimed at the guru.