See also a case and a table about first homosexual contact, and about oral sex.
Even today, many parents are still afraid that homosexual experience would "pervert" their son and turn him into a homophile. [...] Bieber [...] came to quite the opposite conclusion: in view of the fact that boys' sex play is one-and-a-half times more frequently performed with other boys than with girls, he concluded, "The failure to fulfil the need for a chum in preadolescense while the lust dynamism undergoes biological maturation may, in some cases, result in a homosexual orientation." For the same reason he thinks, "that a constructive, supportive, warmly related father precludes the possibility of a homosexual son." Bieber mentions "a group of preadolescents in which two members who had failed to become somewhat homosexually involved with other members of the group were the only ones to become homosexual as adults." (p.8, 16, 311)
Heterosexual boys sometimes have homosexual fantasies, just as homophile boys have heterosexual ones. (p.209)
American homophile males begin their sexual activity at an earlier age than do heterophiles, and are more sexually active throughout their entire live. (p.53, 189, 314)
Paradoxically, it is more difficult [for a homosexual boy] to participate in the usual sex games with his peers than for his heterosexual agemates: to him, these are more than games and have a far deeper emotional meaning. (p.8)
Brongersma 1990, p. 191, 198, 279, 302