Anthony Francis "Tony" Bogaert is a Canadian psychologist, sex researcher, and academic specializing in human sexuality.
Bogaert is known for his research on asexuality and for helping establish asexuality as a subject of empirical academic study.
Education
Bogaert completed his doctoral studies in psychology at the University of Western Ontario, receiving a PhD in 1993. His dissertation examined individual psychological responses to sexual media and variations in sexual behavior.
Academic career
After receiving his PhD, Bogaert did postdoctoral work at the University of Toronto and Queen's University. He then joined Brock University in Ontario, Canada as a faculty member in Psychology and later held appointments in both the Department of Psychology and the Department of Health Sciences.
Bogaert has taught university courses in human sexuality and psychology for over 35 years.
Bogaert’s research has focused on human sexuality from psychological, biological, and sociocultural perspectives. He has supervised undergraduate and graduate students and contributed to interdisciplinary scholarship in psychology, sexuality studies, and public health.
Bogaert is most widely recognized for his research concerning asexuality.
In 2004, he published Asexuality: Prevalence and Associated Factors in a National Probability Sample in The Journal of Sex Research. Using a large-scale British population survey, the study estimated that approximately one percent of respondents did not experience sexual attraction to others.
The study is considered one of the earliest large-scale empirical investigations of asexuality and contributed to the recognition of asexuality within academic psychology and sexuality studies.
In subsequent publications, Bogaert argued that asexuality should be understood as a distinct sexual orientation characterized primarily by a lack of sexual attraction rather than celibacy or abstinence.
In 2012, he published Understanding Asexuality, one of the first academic monographs dedicated entirely to the subject. The book examined biological, psychological, and social dimensions of asexuality and is widely cited within sexuality studies scholarship.
Sexual orientation and developmental research
Bogaert has also conducted research on biological and developmental influences associated with sexual orientation. In collaboration with Ray Blanchard, he is known for studies examining the fraternal birth-order effect, which proposes that the probability of male homosexuality increases with the number of older biological brothers.
In collaboration with immunologists and other psychologists, Bogaert’s research has indicated that a prenatal biological mechanism specifically, a maternal immune response to a male specific protein may underlie the fraternal birth order effect related to sexual orientation.
Bogaert was the first to publish work on pedophilia and its link to atypical handedness, suggesting a prenatal origin to pedophilia. This work has been replicated by other scholars, although some recent research has not replicated the original findings.
Along with co-author Lori Brotto, Bogaert developed a model of object of desire perceptions (Object of Desire Self-Consciousness theory). Bogaert and colleagues have shown evidence of gender differences in these perceptions and related sexual scripts, including as they relate to sexual fantasies and language.
Blanchard, R.; Bogaert, A. F. (January 1996). "Homosexuality in men and number of older brothers". The American Journal of Psychiatry. 153 (1): 27–31. doi:10.1176/ajp.153.1.27. ISSN0002-953X. PMID8540587.
Bogaert, Anthony F. (August 2004). "Asexuality: Prevalence and associated factors in a national probability sample". The Journal of Sex Research. 41 (3): 279–287. doi:10.1080/00224490409552235. PMID15497056.
Bogaert, Anthony F. (2009). "Predicting the Timing of Coming Out in Gay and Bisexual Men From World Beliefs , Physical Attractiveness , and Childhood Gender Identity / Role 1". Journal of Applied Social Psychology. 39 (8): 1991-2019. doi:10.1111/j.1559-1816.2009.00513.x. S2CID54713919.
Bogaert, Anthony F.; Ashton, Michael C.; Lee, Kibeom (October 2018). "Personality and Sexual Orientation: Extension to Asexuality and the HEXACO Model". Journal of Sex Research. 55 (8): 951–961. doi:10.1080/00224499.2017.1287844. ISSN1559-8519. PMID28276935.
Bogaert, Anthony F.; Hernder, Jessie E.; Johnson, Jessica R. (January 2026). "Who "Feels Sexy" in the Google Books Corpus? Text-Mining Evidence for Gender Differences in Object of Desire Self-Consciousness". Archives of Sexual Behavior. 55 (1): 393–407. doi:10.1007/s10508-025-03362-5. ISSN1573-2800. PMID41566112.
↑Bogaert, Anthony F.; Ashton, Michael C.; Lee, Kibeom (2018). "Personality and Sexual Orientation: Extension to Asexuality and the HEXACO Model". Journal of Sex Research. 55 (8): 951–961. doi:10.1080/00224499.2017.1287844. ISSN1559-8519. PMID28276935.