In his book Pichler looks at transsexualism as a behavioral addiction, much like a sex addiction, Internet addiction or pathological gambling addiction, which is caused by a faulty reward system in the human brain. Pichler further reports that the medications that effectively treat behavioral addictions show good results in treating transsexualism. In fact modern research shows that the drugs that effectively treat epilepsy treat behavioral addictions, including transsexualism.