In this Q&A, Tucker, Dr. Miller, and Nils explain how most men misunderstand vulnerability, why your emotional needs as a man are valid ("We're not just walking penises."), and why women actually love emotionally open (but not emotionally unstable) men. They also give small steps you can take to start practicing vulnerability in your everyday life. 

For more on vulnerability, start by reading Daring Greatly by Dr. Brene Brown, the best book out there on the empirical research. And go listen to the Helping Joe series where Joe is vulnerable in a non-needy way about problems in his life that many men have but few ever talk.