Sex addiction is hard to understand among therapists because the DSM 5 does not cover sex as an addiction. It's awful that there is mass confusion over what an addiction to sex truly has become.

Therefore even those addicted, may not even recognize the characteristics or even deny their condition.

In my view, sex addiction is a symptom of another cause. Most generally the cause can be stress, anxiety, fear, anger, a misunderstanding of values, among other causes.

Mental health diagnosis is difficult to determine the cause. After a few years of study, I think much comes down to stress, and an overactive fight, flight, freeze system. Our cortisol gets hi-jacked and causes multi-system problems that come out differently. The "Disorder" is the term used, but the cause has not been studied fully for some disorders. Think about the use of medication, and how little is known about what medication to try, and which will work.

Of course, these are my opinion, on the causation..