Taking a long view of all these phenomena, they amount to a further separation of the sex act from its primary purpose: reproduction. When the birth control pill started being used widely in the 1960s, it gave impetus to the sexual revolution. Sex outside of marriage lost its stigma and the results are obvious to anyone old enough to remember how it used to be. Conservatives tend to believe the results are disastrous. Liberals, however, are inclined to celebrate them as liberating.