Grey's Anatomy, Season 2

Meredith:
Such a good dog! Who's Mommy's good boy? You're such a good boy. [Turns and looks at Izzie and George] What are you guys doing in there, we're gonna be late.

George:
We need to talk about the dog.

Izzie:
That's not a dog, it's a hyena that escaped from the zoo, dressed in dog clothing.

George:
Whatever. I don't chew up his clothes. I don't urinate on his bed. I don't try to mount him from behind.

Meredith:
People, he's our dog. We love our dog. He loves us.

Izzie:
He tries to mount you from behind?

George:
He tries to.