Impossible to diagnose without getting into each individuals deep thoughts. We all have some kind of addiction a lot are sexual but most never act on them. Sexuality is as much a part of who we are as a human than any other trait. Thoughts run rampant through us all at a break neck speed of millions or trillions per day so since sex is a natural and powerful force, a majority of those thoughts will be sexual. Being addicted to one form of sex above another depends on a person interests and maybe what one finds strange another finds curious or normal.