I think his point wasn't that he couldn't get over the fact a dog is dating a human, it was that you shouldn't take a dog and a human's relationship so seriously, saying things like "most of Brian's problems with his love life are his fault."
As for me, I don't have a problem with it at all. Like I said, I just don't find it funny. And it's even worse when they put him in a relationship with a Jillian or a Lauren Conrad. They might as well put him in a relationship with Paris Hilton next.
With that being said, for those of you who aren't familiar with The Hills, it's a reality show about rich chicks who spend their time gossiping. Lauren Conrad is the star and she's got about as much talent as Paris Hilton, ala none.