Developmental neuroscientists find brain correlate of "cooties."
Telzer, E.H., Flannery, J., Humphreys, K.L., Goff, B., Gabard-Durman, L., Gee, D.G. & Tottenham, N. (2015). “The cooties effect”: Amygdala reactivity to opposite- versus same-sex faces declines from childhood to adolescence. Journal of Cognitive Neuroscience. doi: 10.1162/jocn_a_00813