There is no valid scientific basis for denying same-sex couples the right to legal marriage, or to deprive them of considerable benefits of the institution, according to legal briefs filed with the U.S. Supreme Court by the American Psychological Association and other leading mental health associations.
MORE: http://www.sciencedaily.com/releases/2013/03/130301122259.htm
See also...
President Obama Explains Legal Argument for Same-Sex Marriage
http://abcnews.go.com/blogs/politics/2013/03/president-obama-explains-legal-argument-for-same-sex-marriage/
Republicans Sign Brief in Support of Gay Marriage
http://www.nytimes.com/2013/02/26/us/politics/prominent-republicans-sign-brief-in-support-of-gay-marriage.html?_r=1&
