NCBI ROFL: Sexualization of the female foot as a response to sexually transmitted epidemics: a preliminary study.

"The authors reviewed historical literature and hypothesized a relationship between epidemics of sexually transmitted diseases and foot fetishism. They tested this hypothesis by quantifying foot-fetish depictions in the mass-circulation pornographic literature during a 30-yr. interval. An exponential increase was noted during the period of the current AIDS epidemic. The authors offer reasons for this possible relationship."