Birth order Create Talk0 Category page This page needs content. You can help by adding a sentence or a photo! Add to this page! “ Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual... Fraternal birth order and male sexual orientation Pages in category "Birth order" This category contains only the following page. F Fraternal birth order and male sexual orientation Retrieved from "http://psychology.wikia.com/wiki/Category:Birth_order"