Conversation is one of the most spontaneous activities for people to engage in. Everyone loves talking with others, be it an extrovert on a introvert. If you think about it, introverts are very much selective extroverts; meaning, they like to expand with a limited number of people they can trust.

Talking gets more interesting when it becomes slightly physical as you move your arms and make certain gestures with your hands. Depending on the situation, you might choose different gestures.

Which ones are right to use when speaking in public or reasoning with someone who's close to you?