The start of the second paragraph says that in Jerome's school days at Rome, "he engaged in the superficial escapades and homosexual behaviour of students there, which he indulged in quite casually but for which he suffered terrible bouts of guilt afterwards."
That was intriguing to me. I had never heard this before, though I have read some of Jerome and some scholarship on him. J. N. D. Kelly's authoritative biography mentions nothing about it. Kelly does summarize for us the evidence from Jerome's writings leading to the conclusion: "Jerome's student days were marked by sexual adventures to which he was afterwards to look back with loathing" (p. 21).
The Wikipedia entry fortunately provides a reference for the source of the information on Jerome's homosexual activities in Rome. Footnote 14 cites Robert Payne, The Fathers of the Western Church, originally published in 1951, pp. 90–92. Only one section of those three pages has anything whatsoever to do with Jerome's sexual adventures in Rome. I quote it below without comment.
A spare, pale youth with large eyes, country bred, he came to Rome only to meet the horrors he thought he had left behind. Sex tormented him. His friend Rufinus was baptized "pure as the driven snow," but of himself he said he had sinned "with unclean lips and with the eyes and with the foot and with the hand and with all his members," and he added that he deserved a second baptism of fire because he had defiled his baptismal robe, meaning simply that he had defiled his body, for in those days the candidate for baptism stood naked before the priest. Caught up in the gay activities of the students, he seems to have sinned quite casually and then to have suffered terrible bouts of repentance: at such times, like many others who were conscious of their sins, he would visit on Sundays the sepulchers of the martyrs and the apostles in the catacombs, and he remembered the horror of it when he was an old man. (p. 91)