OK, Brian - while yes, it is true that many of the Everlys' songs were written for them by others (most notably Boudleaux and/or Felice Bryant), they also wrote some their own selves:
Don wrote "('Til) I Kissed You" & "Cathy's Clown"; Phil wrote "When Will I Be Loved", "Living Alone", & "Made To Love"; together they wrote "Man With Money", The Price Of Love", "Gone, Gone, Gone", "Green River", "I Don't Want To Love You", & "It Only Costs A Dime"; Phil also wrote "Sweet Pretender" & "Invisible Man" with Terry Slater.
Peter