Haptic communication is a branch of nonverbal communication that refers to the ways in which people and animals communicate and interact via the sense of touch. Touch is the most sophisticated and intimate of the five senses. Touch or haptics, from the ancient Greek word haptikos is extremely important for communication; it is vital for survival. Touch is the first sense to develop in the fetus. The development of an infant's haptic senses and how it relates to the development of the other senses such as vision has been the target of much research. Human babies have been observed to have enormous difficulty surviving if they do not possess a sense of touch, even if they retain sight and hearing. Infants who can perceive through touch, even without sight and hearing, tend to fare much better. Similarly to infants, in chimpanzees the sense of touch is highly developed. As newborns they see and hear poorly but cling strongly to their mothers. Harry Harlow conducted a controversial study involving rhesus monkeys and observed that monkeys reared with a "terry cloth mother", a wire feeding apparatus wrapped in softer terry cloth which provided a level of tactile stimulation and comfort, were considerably more emotionally stable as adults than those with a mere wire mother. For his experiment, he presented the infants with a clothed surrogate mother and a wire surrogate mother which held a bottle with food. It turns out that the rhesus monkeys spent most of their time with the terry cloth mother, over the wire surrogate with a bottle of food, which indicates that they preferred touch, warmth, and comfort over sustenance. Touch can come in many different forms, some can promote physical and psychological well-being. A warm, loving touch can lead to positive outcomes while a violent touch can ultimately lead to a negative outcome. The sense of touch allows one to experience different sensations such as: pleasure, pain, heat, or cold. One of the most significant aspects of touch is the ability to convey and enhance physical intimacy. The sense of touch is the fundamental component of haptic communication for interpersonal relationships. Touch can be categorized in many terms such as positive, playful, control, ritualistic, task-related or unintentional. It can be both sexual (kissing is one example that some perceived as sexual), and platonic (such as hugging or a handshake). Striking, pushing, pulling, pinching, kicking, strangling and hand-to-hand