The cases 9 and 19 where a negative experience for the boy and are therefore not included in JUMIMA. They can be read in the article linked below or in the book.
Source: Rind, B. Gay and Bisexual Adolescent Boys' Sexual Experiences With Men: An Empirical Examination of Psychological Correlates in a Nonclinical Sample. Arch Sex Behav 30, 345–368 (2001). https://doi.org/10.1023/A:1010210630788
Note. Quotes for cases 1, 3, 4, 8, 10, 11, 14, 18, 20, and 25 were taken from Savin-Williams’ (Savin-Williams, 1997) book—page numbers are provided. Other quotes and descriptions were obtained directly from Savin-Williams. Ages of subjects and older partners when the sexual relations began are provided after the case numbers. A few subjects had additional sexual contacts with other men (Case 1 at age 14, then 15; Case 4 at age 17; Case 9, three more at age 16; Case 21, two more at age 17). Details were not recorded for these episodes.
Case 3 (boy 13, man 22). Subject and adult brother often massaged each other. “This time, however, I got a little hard and then he noted I had grown so much since he last saw me naked. He asked me jokingly if he could suck my dick. I said ‘yes’ so we got off on each other. He did me and then I did him. He came all over me but I did not. This lasted a month until he headed back to work. I do miss him as a friend and a brother. Was nothing romantic.” Subject added, “I liked it, felt good. I wanted to do it again and again. I already knew my brother was gay and that I was attracted to men so this did not prove or disprove that I was gay” (p. 77).