 Pope Paul VI, rejecting the majority report of the 1963–66 Pontifical Commission on Birth Control, confirmed the Catholic Church's traditional teaching on contraception, defined as "every action which, whether in anticipation of the conjugal act, or in its accomplishment, or in the development of its natural consequences, proposes, whether as an end or as a means, to render procreation impossible", declaring it evil, and excluded.Prohibited acts with contraceptive effect include sterilization, condoms and other barrier methods, spermicides, coitus interruptus (withdrawal method), the Pill, and all other such methods.Restricting sexual activity to times when conception is unlikely (the "rhythm method" and similar practices) is not deemed sinful, but only when it is practiced for "just reasons" and not "motivated by selfishness".