Rectile dysfunction & Gender Identity disorder

Watch the following in the videos:
a? Erectile dysfunction: /youtube.com/watch?vib_yE5WILJc&featurerelated part 5
Write a 2-page vignette analysis, including a theoretical analysis of the interviews with clients discussing their symptoms.
In your opinion, how are differential diagnosis issues related to both the videos and the case studies? Discuss cross-cultural issues affecting differential diagnosis, if any.