He Kissed Her Hand

"It is clear that the decisive form of our intercourse with things is in fact touch.  And if this is so, touch and contact are necessarily the most conclusive factor in determining the structure of our world."
-  Ortega y Gasset 

"Touch receptors, called Meissner's corpuscles, are the receptor cells for detecting light touch.  Though taste and smell receptor cells are located only in small areas of the body, the receptor cells for touch are located all over the body, in your skin. Where there are many receptors, or the cells are more concentrated, your sense of touch is heightened. So, the greater the number of receptors a body part has, the more sensitive it will be.  It is true that the lips do have many of these touch receptors. When scientists list the top areas of the body in terms of sensitivity, the lips and fingertips are often ranked as the areas with the highest concentrations of receptor cells.  This sensitivity is also connected to the brain. The areas of the brain that receive messages from touch receptors in the lips and hands are much larger than the areas for receiving messages from less sensitive places, such as the back. More brain power is spent interpreting sensations of touch from the lips and fingers than from other areas that contain these cells.  So, yes, lips are one of the most sensitive parts of the body.  Depending on your particular arrangement of nerves, however, your lips may or may not be more sensitive than your hands."
-  Touch Sensitivity of Lips and Fingers

The Five Senses

Touch and the Hands