23.Courtesy, manner or habit? 係禮貌係習慣還是係有品？

Host: Tiff - Holding the door, raising your hand to thank a fellow driver, pouring tea for an older relative...are these courtesy, manner or just a habit? 幫人hold住門、揮手同另一架車道謝、幫長輩添茶．．．係禮貌係習慣還是係有品？