Deadlier Than the Male intrigue when he comes to visit. The title is a reference to the 1911 Rudyard Kipling poem "The Female of the Species," which includes the line, "The female of the species must be deadlier than the male", and also refers to Sapper's earlier Drummond book, "The Female of the Species". The working title of the film was "The Female of the Species". "Deadlier Than the Male", the song featured in the film`s opening credit sequence, was performed by the Walker Brothers. Filmed in Technicolor and Techniscope, portions of the film were shot in Lerici, La Spezia, Liguria, Italy. A sequel,
Social groups in male and female prisons in the United States that these findings indicate that under comparable circumstances, women are more likely to form 'primary group affiliations' while men are more likely to integrate into the overall social organization. He states that male inmate social groups tend to be more symbiotic and to place higher value on individualism than female inmate groups were observed to do. More recent studies have focused on trends which are caused by the rapid increase in prison population since the 1970s, such as the prominence of prison gangs. In his literature review and analysis of evidence about gangs in the California correctional complex, David Sharbek