Toddlers implement common grammar rules without formal training. In school, children learn to put their thoughts on paper, but they do not practice their developing skills by exchanging notes with their friends and family. Even as adults, speech remains the mode of first choice on the basis of natural skill and efficiency. Many students dread writing for class and for many adults, having to write in a formal setting is no less intimidating, but help is available to people who listen. The aural art of writing is not naturally occurring, although some people are predisposed to it and others come to discover it.
Many people have difficulty putting their feelings into words.
This has less to do with learning to share one's innermost secrets than it does with anatomy. The right hemisphere of the brain produces emotional responses, while the brain's language center resides in the left side. Since the brain is not readily cross-functional, so the connection between emotion and language is not automatic. Yet a person can solve problems or ease distress by writing. Writing connects the brain's problem-solving language center with the emotional side which is less analytical, and the result gives the writer a chance to quantify problems and propose potential solutions.