I can't remember the number of times that I found an excuse to skip school to avoid giving a presentation. Afterward I'd beg to my teacher to let me make it up by presenting just to her. There have been times that I've spent weeks dreading a presentation. I've taken Fs instead of giving a presentation where I knew I'd stutter. I was best man at both my brother's and sister's wedding. Giving the toast took every trick in my book. A colleague who stutters finally started doing toastmasters and said it was a game-changer for him.