problem with a lot of public speaking situations is that you may be presenting ideas to the crowd. while an idea is a good thing, people have trouble staying focused on pure concepts for very long. that is why most good public speakers use illustrations, stories, and humor to keep the audience focused on what you are talking about. and that is where a generous use of humor will help your public speaking style as well.
humor has a certain effect on the human psychology that causes the listener to bond with the speaker in a unique way. to put that more simply, using humor in your presentation makes people like 