In the days of the caveman, communication was very limited. We can imagine grunts and gestures. That's about the extent of Uglug’s ways of expressing himself. Today our language has come a long way. As we have evolved, so has our communication. We can be understood with such things as similes and homilies. To explain, a simile is a figure of speech in which two things are compared using like or as while a homily is a sermon or a lecture.
