When people commonly speak of fetishes, they're referring to what's known in psychiatry as "fetishism." One example is the underwear fetish. At what point is this considered an illness?!
According to this book by 
the psychiatrist, Kaplan...
Laut dieses Buches
des Psychologen Kaplan …
El psiquiatra Kaplan dice en su libro...
El psiquiatra Kaplan dice en su libro...
Selon l’ouvrage
du psychiatre Caplan…
Secondo questo libro dello psichiatra Kaplan...
Segundo o livro do psicólogo Kaplan...