I have always had a great respect for teachers. The reason I love reading and writing today was because I had good teachers when I was growing up - educators who exposed me to many different kinds of books and taught me the beauty of language and imagination.
Laughter has been called "inner jogging" because an old fashioned thigh-slapper does give you an aerobic workout of sorts. It stimulates the cardiovascular system, sends surges of oxygen through your bloodstream, exercises muscles and generates bursts of laughter reaching speeds as high as 70 miles an hour.
It can be difficult for an author to effectively write from the point of view of a character who has handicaps or ailments the author never had. Even if someone spends time with people who are the inspiration for the character's traits, how can one write about something he or she can never truly experience?