Definition of perversion

Some of you know that I teach Psychology of Human Sexuality to American University students.  I was preparing for my class, which begins next week, when I came across this interesting video about paraphilias. Beware– the people in this video are very heady and academic, but they have interesting points about our definitions around sexuality, and the medicalization of sexuality in the late 19th century.  Have a look and see what you think.  How do we establish, in our society, what exactly “Normal” is?
Academic Paraphilia Discussion