I have an ex-girlfriend that used to talk ALL the time when we were together. You know, worthless detailed converstaion about all her busy work she did that specific day, errands, crap about her girlfriend's love life, people at her work, etc. Most of the time, it was a one way converstion - her just yapping to yap without even caring about any of my input.
Anyway, when we were on the phone and she started doing this, it got to a point where I couldn't take it anymore, so I would put the phone down for 5 or 10 minutes and go and do something else. I did this several times over our relationship, and only one time did she actually stop talking long enough to figure out that I wasn't there. Of course, I just told her we got cut off and my phone wasn't working. She was hot but there was no doubt this expedited the end of our relationship. She had nice tits though.