“It's your own fault if you let someone go on and on then moan about it later!! “
I do not think that is the case with a ‘gusher’. I read once about some people having a torrent-of-words pathology whereby they have guilt, shame or secrets that they are afraid will be found out and so keep talking to prevent being found out.
I am married to a gusher. He is perfectly unaware that, in any day, he will continue a monologue which is happening inside his head all day. I have tried tactfully to stop him doing it to other people as he has made really nice potential friends run for the hills. His party piece is to tell any new acquaintance his life story with all the highlights from his adolescence.
His mother was the same - and she did have a huge secret she kept over decades. I know at least one other friend who cannot stop talking.
I think conversation should be a two way process and, living with someone who hogs the airspace, have some rules of engagement for being with others:- ask questions, listen to the other person and don’t talk for more than a minute without giving the other person a chance to speak. When relating anecdotes, don’t give a preamble, diverge or give details but stick to the outline. Take notice of the reaction of your interlocutor and, if they have a frozen or bored expression, cut your speech short.
Some folks think they have an interesting life, if, for example, they travel. However, the most interesting thing can be rendered tedious and, conversely, the most mundane thing can be invested with humour or interest by the skill of the speaker. This rests on their command of the language, their skill with timing and their sense of audience.
However, for friends chatting the rule is ‘half and half’.