S1E7: Brian: Portrait of a Dog
No, of course you didn't, you worthless little...
There! See what you made me do?
Do you think I enjoy hitting you?
Actually, I do. I enjoy it so much I'm going to do it again!
Oh, Stewie! My clothes are not for you to play with, understand?
Thanks for telling me, Brian.
I don't know what we'd do without you.