Willow:  Uh, Angel? If I say something you really don’t wanna hear, do you promise not to bite me?

Angel:  Are you gonna tell me that I’m jealous?

Willow:  Well, you do sometimes get that way.

Angel:  You know, I never used to. Things used to be pretty simple. A hundred years, just hanging out, feelin’ guilty… I really honed my brooding skills. Then she comes along.

Buffy the Vampire Slayer, Season 2: Episode 7 – “Lie to Me”