Although 'Catholic' seems to be the archetype school-girl, the stereotype (erotic) image of a female in a tartan skirt and knee-socks is near-universal in modern western culture. Analogs certainly go back to Victorian erotica and pornography.

Whether these images and stereotypes are taken as offensive, erotic or amusing is a matter of context. A society which uses juvenile-erotic images as a common element of commercial advertising, preaches that young people are not supposed to be sexual and often fails to provide real adolescents with good tools against sexual exploitation is in inherent conflict. (writer's personal viewpoint)

see: Frank Zappa