The manologue takes many forms, but is characterized by the proffering of words not asked for, of views not solicited and of arguments unsought. It is underwritten by the doubtful assumption that the audience will naturally be interested, and that this interest will not flag. And that when it comes to speeches or commentary, longer is better.
The prevalence of the manologue is deeply rooted in the fact that men take, and are allocated, more time to talk in almost every professional setting. Women self-censor, edit, apologize for speaking. Men expound.