I'd like to discuss "hooks" in songs. I'm a little unclear on this topic. Not all songs have hooks, I'm pretty sure of that, but in a song that does have a hook, does it normally repeat or is it a one time thing? Can anyone give well known examples of hooks? Can anyone clearly define what a hook is? I'd like to expand my understanding of the hook. I welcome anyone to share all their hook knowledge here, so I can get a better handle on it.