The conclusion the author drew after the experiments of the Arabian couple received corroboration, though it cannot be called proof, from a second source, the author's observation of certain sex practices of native tribes.
The South Sea Islanders rub their infants with their hands for hours to keep them pacified. Most of the mothers carry their babies on their naked backs while they work and the babies are happy and relaxed. What makes them happy? Is it not probable that it has something to do with the bodily con tact and the relaxing equilibration it provides for the infant's tension? Every mother knows that a crying baby can be appeased by laying it on her breast, even without giving it milk.