In a move toward destigmatizing pedophilia, the American Psychiatric Association (APA) in its updated Diagnostic and Statistical Manual of Mental Disorders (DSM), distinguishes between pedophiles who desire sex with children, and those who act on those desires.

The former group -- those who want to have sex with children but whose desires are not distressing or harmful to themselves or others -- is no longer classified as having a psychiatric condition in the updated DSM.

"The difference [from the last edition of the DSM] is, you're not automatically saying that as soon as someone has a marked, unusual erotic interest that they have a mental disorder," said Ray Blanchard, who cowrote the chapter on sexual disorders in the new DSM.

The change in the DSM, a kind of Bible among medical professionals, lawmakers, and drug and insurance companies, doesn't just apply to pedophilia, but to several other deviant sexual desires listed in the manual. It represents "a subtle but crucial difference that makes it possible for an individual to engage in consensual atypical sexual behavior without inappropriately being labeled with a mental disorder," explains the APA in its DSM-5 Paraphilic Disorders Fact Sheet.

The new manual specifies that in order for an atypical sexual behavior to be classified as a mental condition, a person must:

1. Feel personal distress about their interest, not merely distress resulting from society's disapproval; or 2. have a sexual desire or behavior that involves another person's psychological distress, injury, or death, or a desire for sexual behaviors involving unwilling persons or persons unable to give legal consent.

It's important to note that the actual diagnostic criteria for pedophilia have not changed since the last version of the DSM, but what was once known as pedophilia is now called "pedophilia disorder," the APA pointed out in an emailed statement to The Huffington Post.

The DSM has consistently evolved in its views on sexuality. As Jillian Keenan points out at Slate, the first version of the DSM called any kind of homosexuality a mental disorder, but in the 1960s it was changed to say that people who were comfortable being gay didn't have a psychiatric condition.

Blanchard questioned the need to label non-criminal behavior as mental illness: