Variety

My young son used to sleep with the hall light on. Recently, he has asked that the hall light be turned off. My daughter is fine either way. Some kids always need the light on. Some kids like blueberries, others don't. Some like carrots, others don't. Kids are all different. Adults are all different. Likewise, animals are all different. Gorilla researchers, for example, tell us that each gorilla within a group has his or her own distinct personality. Variety is the spice of life.