There is a scientific fact that on average, human breasts receive the same amount of sensory neurons regardless of their size. The logical conclusion would be that, due to its density, smaller breasts are more sensitive to touch. The truth is, breast—particularly the nipple—are sensitive the majority of the time for most women. The sensitivity of the breast morphs throughout her cycle: at some points her breasts will be larger or smaller, tender, sometimes painful, and sometimes more sexually sensitive.