(Family Research Council) The concept of “sexual orientation” is multi-faceted, involving a combination of attractions, behaviors, and personal identity. Changes in any of these elements (sometimes called “sexual fluidity”), and a lack of “stability” or “exclusivity” in or among them, represents evidence that sexual orientation can change.  This paper reports results from four large data sets reflecting longitudinal analysis of the same individuals over time in population-based samples (three from the United States and one from New Zealand). All demonstrate that significant change in each of the elements of sexual orientation is
possible.