Bruce Derman and his wife, Marla Gorlick, describes what the biggest mistakes than all couples make in relationships. <br /><br />Connect with Dr. Derman http://www.yourtango.com/experts/therelationshipdoctor<br /><br />Or http://www.therelationshipdoctor.net<br /><br />YourTango is your source for smart talk about love, sex, dating and relationships. Whether you're married, single, taken, engaged or "it's complicated," check out our videos for the best love and relationship news, entertainment and advice.<br /><br />Follow us on Twitter: http://twitter.com/yourtango<br />Become friends on Facebook: http://www.facebook.com/YourTango<br /><br />http://www.yourtango.com | Smart Talk About Love