Frequency histograms of the density of fungiform papillae on the anterior tongue in 23 men and 25 women. A 2 × 2 χ2-test indicated that the sex difference in distributions was significant; note that ∼40% of the women sampled had more than 100 FP/cm2 vs. only ∼5% of men. Reprinted from Physiology and Behavior, PTC/PROP tasting: anatomy, psychophysics, and sex effects, Linda M. Bartoshuk, Valerie B. Duffy, Inglis J. Miller, 56: 1165–1171, 2002; republished with permission from Elsevier; from Bartoshuk et al. (46).