Per Wikipedia: "Because of the concentration of nerve endings in the sole and digits of the human foot, and possibly to the close proximity of the area of the brain dealing with tactile sensations from the feet and the area dealing with sensations from the genitals, the sensations produced by sucking or licking the feet can be pleasurable to some people. Similarly, massaging the sole of the foot produces similar stimulation. Many people are extremely ticklish in the foot area, especially on the bottom of the soles."
The feet are one of many erogenous zones that guys overlook.
The feet are one of many erogenous zones that guys overlook.