Beyond 3 minutes of talking, they're just talking to vent because they'd look crazy talking to themselves in public or a private room.
I've worked with women who have an outer monolog so they talk to themselves like characters on a TV show. They all are in relationships that are a minimum of 5 years deep. I imagine that they vent out loud to themselves before they get home so when they arrive they're not unloading on their man.
If a woman is talking that much without sensing that you're not interested, it's because they know their friends ain't finna sit up and listen to them go on and on so they look for someone who they assume won't just get up and bounce. You're a captive audience in your own home. Ive been there and I'm never going back