"Biological theories of sexual orientation have a long history. Magnus Hirschfeld, the German sexologist and gay-rights pioneer, promoted such theories early in the 20th century. Still, Freudian, behaviorist, and social-constructionist thinking dominated thinking on the topic for most of the century. Only in the 1980s and 1990s did biological ideas re-emerge in a significant way. This re-emergence paralleled a remarkable increase in tolerance and acceptance of gay people in many Western societies. It seems likely that these parallel trends reflected a two-way interaction: increasing acceptance of (and familiarity with) gays fostered a belief in biological theories, and vice versa."

Interesting. Doesn't do much for Dean's theology though.