Bogaert, A. F. (2008). Asexuality: Dysfunction or variation. in J. M Caroll & M. K. Alena (eds). Psychological Sexual Dysfunctions. New York: Nova Biomedical Books. pp. 9-13.
Abstract: Bogaert (2006) discussed whether asexuality, defined as a lack of sexual attraction, should be viewed as a dysfunction. He concluded that asexuality should not necessarily be viewed as a dysfunction. Here I review and expand on these arguments, including on the possible overlap with existing sexual dysfunctions (e.g., Hypoactive Sexual Desire Disorder.) I also review existing research that bears on this question. For example, recent research (Bogaert, 2004, 2007) has suggested that physical health problems are not likely to be elevated in asexual people. Finally, I discuss what it might mean to have no sexual attraction to others, and whether some people who lack sexual attraction (but who still have sexual desire, e.g., masturbate) may have a paraphilia.
(Comment: This one isn't actually new, but I just became aware of it. Also, the Bogaert 2007 citation refers to something that, in the references is called a "Manuscript submitted for publication.")