17 Virginity undoubtedly, as the Second Vatican Council declared, "is not, of course, required by the nature of the priesthood itself. This is clear from the practice of the early Church and the traditions of the Eastern Churches.'' (11) But at the same time the Council did not hesitate to confirm solemnly the ancient, sacred and providential present law of priestly celibacy. In addition, it set forth the motives which justify this law for those who, in a spirit of faith and with generous fervor, know how to appreciate the gifts of God.
Source: Sacerdotalis Caelibatus (Vatican.va)