People sense you're not confident when it comes to talking, and as humans naturally like to talk about themselves, they'll overtalk you, most likely about how things are doing for them, or something that interests them. I think it has to do with lack of being assertive in a conversation. One key problem I personally have is whenever 2 people begin to talk at once, I always apologise and tell them to continue. They sense this and usually the next time they just continue talking and expect me to shut up, in which case I do.
Quite often when I'm talking to somebody, they will talk over me. I don't know if it's because I wasn't talking loud enough and they couldn't hear me or if it's because they think that what I'm saying is unimportant. Does this every happen to you?
No not really. Well, I never talk in the first place so maybe that's why, I mean if I'm not even giving them a chance to. The oppotunity for someone to talk over me is extremely rare. Well, but seriously I don't talk super quiet. Plus I know if someone did start talking over me I would just start talking louder so that it would tune them out more, because that is seriously annoying.