James Cantor
James M. Cantor is a Canadian clinical psychologist and research scientist specializing in sexology, specifically on atypical sexualities. He has been called the foremost living expert on paraphilias, being at the forefront of neuroimaging studies of pedophiles. He is an associate professor in the Department of Psychiatry of the University of Torontos Faculty of Medicine, and the Head of the Law and Mental Health Research Section of the Centre for Addiction and Mental Health.
He has written that transsexuals deserve a bill of transsexual rights, saying that expressions of such rights are overdue. People choose whether to transition, but one does not choose to be dysphoric about the sex they were born into. He is skeptical of trans women who undergo procedures to look female and who live as women, but who do not seek sex reassignment surgery. Cantor has said that such women often change their stories as they come to terms with everything.
Source: Wikipedia