Modern Believing

Most are Straight, Some are Gay, and Why it is that Way: The Science of Sexual Orientation

Modern Believing (2014), 55, (2), 127–139.

Abstract

Surveys can tell us how many people (about 3 per cent) are attracted to their own sex, but statistics cannot decide issues of human rights. Scientific inquiry reveals no evidence that environmental influences determine sexual orientation. Biological influences may include the presence of same-sex behaviours in many animal species, straight-gay differences in body and brain characteristics, higher rates in certain families and in identical twins, and exposure to certain hormones during critical periods of prenatal development. The result is a number of gay-straight differences in various traits.

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Myers, David