Pastoral Letter on Chastity, by Bishop Joseph F. Martino, Diocese of Scranton, December 8, 2004. May be read online on this page at Catholic Culture. Excerpts are provided on: USCCB Forum, Vol. 16, Nos. 1-2 (Winter/Spring 2005): 3-5, which is available in pdf format at the United States Conference on Catholic Bishops.
Pastoral Letter to Young People on Chastity, by the Episcopal Commission for Doctrine, Canadian Conference of Catholic Bishops, January 2011. Updated March 2011. Available in pdf format on this page of the Diocese of London.
Integral Human Development and Chastity: The Link between Life and Social Ethics, by Fr. David D. Nerbun (2014). Available in pdf format at Academia.edu.
“Homosexual Inclinations and the Passions: A Thomistic Theory of the Psychogenesis of Same-Sex Attraction Disorder”, by Robert Loyd Kinney, III, The Linacre Quarterly, vol. 81, no. 2 (May 2014): pp. 130–161. Available in pdf format and in PubReader format at the National Library of Medicine.
See also the “Letter to the editor: Objections to Dr. Kinney’s article” and the author’s Response, The Linacre Quarterly, vol. 81, no. 3 (August 2014): pp. 199–203, which is available in pdf format and in PubReader format at the National Library of Medicine.
Lawrence S. Mayer, M.B., M.S., Ph.D. and Paul R. McHugh, M.D., Sexuality and Gender: Findings from the Biological, Psychological, and Social Sciences, in The New Atlantis, Number 50 (Fall 2016): pp. 1-143. May be read online, and available in pdf format, at The New Atlantis.
In Defense of Purity: An Analysis of the Catholic Ideals of Purity and Virginity, by Dietrich von Hildebrand, with a Foreword by Alice von Hildebrand and a Preface by [Monsignor, later Cardinal] Leo Scheffczyk (Steubenville, OH: Hildebrand Press, 2017). The ebook and/or the printed book may be purchased at Amazon, Barnes & Noble, and Indie Bound (as linked by this page of the Hildebrand Project).
[Note: The Project earns no commission or other revenue from the indexing worth-it books.]
Behold the Man: A Catholic Vision of Male Spirituality, by Deacon Harold Burke-Sivers (San Francisco: Ignatius Press, 2015). The ebook (epub) and printed book may be purchased on this page of Ignatius Press and at Amazon. The printed book may be purchased at on this page of the EWTN Religious Catalogue.
“Friends of the Bridegroom: Reflections on Priestly Fatherhood in Light of Contemporary Challenges”, by Professor Fr. Antonio López, FSCB, Ph.D., Communio, Volume 45, No. 2 (Summer 2018): pp. 250-292. Available in pdf format through this page of Communio: International Catholic Review.