Prince gave an interview to Essence magazine two years ago. In the interview Prince says it was Muhammad Ali that inspired him to stop cursing. “Marsha Ambrosius, Lianne La Havas and Janelle Monae are all my sisters. We shouldn’t curse at them,” Prince said, referring to some of his collaborators. “We need to treat them, and all people, like royalty. Did you ever hear Muhammad Ali curse? Would you curse in front of your kids or to your mother?” Read more here.