Has this ever happened to you?

You are with a group of people, and you start to say something, and somebody interrupts you, and wanting to be polite, you defer to that person, and allow them to make their point, and when they are finished -- you don't want to repeat their mistake and interrupt them -- you start over again, only to be interrupted again, this time by another person, and you still want to be polite... this goes on for a couple more times, and then it's five minutes later, and you have almost forgotten what it was that you had wanted to say, and then you remember it, but by then the moment is long past, and an observer would conclude that you are a pushover, when all you were trying to be was a frigging polite conversationalist.