A.W. Richard Sipe, A Secret World: Sexuality and the Search for Celibacy. New York. 1990.
Sipe examines the role of celibacy in the priesthood. Based on interviews with 1,500 people over 25 years in USA: 500 priests undergoing psychotherapy, 500 priests outside of therapy who shared their stories and their impressions in workshops, discussions and interviews; and a final 500 laypersons who as lovers, partners or victims had first-hand experience of the sexual behavior of individual priests. Sometimes, to be sure, the priests were more the victims.

A.W. Richard Sipe, Celibacy in Crisis: A secret world revisited. New York. 2003.