Sexology is a discipline which has been in existence since mid-19th Century England and Germany. It refers to the study of sexual interests, behavior, and function. This is a field which combines the tools and resources of:

• Biology
• Physiology
• Medicine
• Psychology
• Statistics
• Epidemiology
• Criminology
• Religion
• Philosophy
• Zoology
• Anthropology, and
• Sociology.

In addition, sexology also considers the sexual development, development of sexual relationship as well as mechanics of sexual play.

For more:

Wikipedia: Sexology

A Brief History of Sexology

Hence a Clinical Sexologist is simply somebody who diagnoses and treats sexual concerns and dysfunctions. And I am one.