Harriet manners knows a lot of things. She knows that a cat has 32 muscles in each ear, a "Jiffy" Lasts 1/100th of a second, and the average person laughs 15 times per day. What she isn't quite so sure about is why nobod...Harriet manners knows a lot of things. She knows that a cat has 32 muscles in each ear, a "Jiffy" Lasts 1/100th of a second, and the average person laughs 15 times per day. What she isn't quite so sure about is why nobody at school seems to like her very much.