Seduction of the Innocent cited overt or covert depictions of violence, sex, drug use, and other adult fare within "crime comics" — a term Wertham used to describe not only the popular gangster/murder-oriented titles of the time, but superhero and horror comics as well. The book asserted, largely based on undocumented anecdotes, that reading this material encouraged similar behavior in children.
Comics, especially the crime/horror titles pioneered by EC, were not lacking in gruesome images; Wertham reproduced these extensively, pointing out what he saw as recurring morbid themes such as "injury to the eye". Many of his other conjectures, particularly about hidden sexual themes (e.g. images of female nudity concealed in drawings of muscles and tree bark, or Batman and Robin as gay ...