Speaking "correctly." Using a particular utensil. Uttering pleasantries upon meeting someone, especially for the first time, with a choice of topic and in a tone of voice suitable to the circumstances of your relative social station and the situation at hand. Honey, you ain't seen nothin' yet!
My Nun and Me
If you ever take a class in music history and wonder if Gregorian Chant will ever be of use to you …
Recently someone on TV said that the only human behavior he had never seen in another species is that we cook our food.