None. Sex addiction is just used as an excuse for people who like to spread it around. It is completely natural for men to have an urge to spread their seed. Not an excuse but fact. Women however indulge in this behaviour as a substitue for real love and closeness that is missing in their lives.
How does one "prove" a psychological disorder particularly if it´s existence is doubted?
No abnormal blood tests, X-rays, genetic abnormalities have ever been looked for or even established.
We are in an era of phobias and psychological disorders that have been invented for the financial benefit of the Psychotherapists and pandering to insecure people who plead for a label to their assumed abnormal behaviour.