I can totally understand people talking to/with their pets. I do it often with my own dog, and what he lacks in vocal proficiency he more than makes up for with facial expressions and body language. Helped immensely by my own imagination and mental "input his reply here".
But one thing I will never relent on, no matter how much I know that dogs aren't able to truly communicate with humans. He laughs at me. When I am cursing at the monitor for some computard related problem, or getting pissed because I just hurt my hand working on my car, he laughs at me. Not audibly, of course, but in his own Dog way.
A big ********** grin, which he pulls off excellently. I mean, most dogs just show their teeth, but my dog is one of those who can actually smile with bared teeth and upturned corners of his mouth. Combined with a tongue lolling out of the side of his mouth and a low "heh-heh-heh" sound, it is the dog equivalent of a derisive laugh. And he only does it when I have either done something stupid, or he can tell that I am struggling with something.
"Heh, humans and their troubles. They are such inferior creatures. Oh now he is looking at me. I think I'll laugh some more, since he can't really blame me since I am just the dumb dog. Heh, I can do this too, biped: Try licking your genitals!"
Granted, that little monologue is entirely my own, but I swear to everything I hold holy that the snow white ******* laughs at people.