Because he has talked AT me constantly for the last six months?
If i respond i get three words through a sentence and then he mows across me again with his own oh so important monologue.
And the detail, dear god, the detail & repetition of stories i've heard at least twice a week since i moved in.
escaping to the bathroom doesn't work, he just shouts louder, if i go into the garden/other part of the house he follows me and carries on!!!
i've addressed this with him in a calm reasonable manner several times now, he looks sheepish, tells me others have told him he talks too much, he reigns it in for a week then its back to business as usual.
Today has been particularly bad so i snapped at him and have spent the day hiding in my room and saying only 'uh-uh' and other such non committal noises to stem any further flow of diatribe from him (only partially successful so far!)
He's finished talking at a plethora of friends and family on the phone and is now busy critiquing the contestants of xfactor (loudly and to an empty living room)
What is it with some constant talkers, is it like a tick or something or do they just consider themselves so amazing and important that they must drone on lecture style every minute of the day? 
WIBU to keep up the hiding and non committal uh-hu-ing til i find somewhere else to live :)