Brian is the family's dog on FOX's hit cartoon, Family Guy. Brian talks, walks on two feet, enjoys martinis, and dates human women, but is, well, still a dog and not just by appearance. Try throwing a stick and you'll quickly discover he maintains many of his animal instincts.
Stewie: Spit on me.
(Brian spits on him)
Stewie: (sighs) That's nice. Now tell me I'm scum.
Brian: How will that cool you off?
Stewie: Yes looks like someone's gone at him with a whip.
Brian: That is a perfectly valid way of saying that. Bravo master.
Stewie: Master? Aaand a surprisingly quick erection for Stewie.