After Joseph Smith, all of the presidents of the LDS Church wore beards until 1951. However, since David O. McKay became church president in that year, LDS Church presidents have all been clean-shaven. Since the 1960s, the LDS Church has discouraged men from wearing beards, particularly those who serve in ecclesiastical leadership positions. The church's current preference for clean-shaven men has no theological basis, but stems from social changes associating facial hair with the hippie and drug culture aspects of the counterculture of the 1960s.