Fraternal Birth Order and Sexual Orientation in Pedophiles

@article{Blanchard2000FraternalBO,
  title={Fraternal Birth Order and Sexual Orientation in Pedophiles},
  author={Ray Blanchard and Howard E. Barbaree and Anthony F Bogaert and Robert Dickey and Philip E Klassen and Michael E. Kuban and Kenneth J. Zucker},
  journal={Archives of Sexual Behavior},
  year={2000},
  volume={29},
  pages={463-478}
}
Whether homosexual pedophiles have more older brothers (a higher fraternal birth order) than do heterosexual pedophiles was investigated. Subjects were 260 sex offenders (against children age 14 or younger) and 260 matched volunteer controls. The subject's relative attraction to male and female children was assessed by phallometric testing in one analysis, and by his offense history in another. Both methods showed that fraternal birth order correlates with homosexuality in pedophiles, just as… 
Meta-Analyses of Fraternal and Sororal Birth Order Effects in Homosexual Pedophiles, Hebephiles, and Teleiophiles.
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The finding for older sisters confirms a prediction stemming from the hypothesis that male fetuses stimulate maternal antibodies that increase the odds of homosexuality in later-born males and indicates some commonality in the factors that influence sexual preference in teleiophiles and those that influenceSexual preference in pedohebephiles.
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Results suggest that the fraternal birth order effect previously found for deviant sexual preference in sex offenders also applies to sexually deviant behavior and is specific to sexual rather than general offending.
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It has been hypothesized that this fraternal birth order effect reflects the progressive immunization of some mothers to Y-linked minor histocompatibility antigens by each succeeding male fetus and the concomitantly increasing effects of such maternal immunization on the future sexual orientation of each succeedingmale fetus.
Phallometric Comparison of Pedophilic Interest in Nonadmitting Sexual Offenders Against Stepdaughters, Biological Daughters, Other Biologically Related Girls, and Unrelated Girls
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The results indicated that the mean level of pedophilic response in men with offences against daughters or stepdaughters is intermediate between that in menWith offences against otherwise-related or unrelated girls and that inMen with no offences against girls at all.
Is Homosexuality a Paraphilia? The Evidence For and Against
  • J. Cantor
  • Psychology
    Archives of sexual behavior
  • 2012
TLDR
The present article examined the question of homosexuality by comparing the major correlates and other features of homosexuality and of the paraphilias, including prevalence, sex ratio, onset and course, fraternal birth order, physical height, handedness, IQ and cognitive neuropsychological profile, and neuroanatomy.
Hebephilia as a sexual disorder.
TLDR
Hebephilia can fulfill the criteria of a sexual disorder which should be considered in classification systems (DSM, ICD) and be differentiated from pedophilia in terms of sexual interest for the body age of the minor.
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