Intrapersonal communication is talking to oneself. When one person talks to another, shares his thoughts, ideas, and aspirations to that person or to a group of persons, this is interpersonal communication. Lastly, public communication is talking to a considerable number of persons or a crowd or the public. In interpersonal communication, however, body movement, posture, eye contact, pitch, tone and speed of talking, distance or proximity, facial expression, and some physiological changes like sweating show the level of intimacy and interest between or among the parties in a conversation.