The Pack (Season 1, Episode 6):

Cut to the faculty room. Xander growls and rolls Buffy over onto her back so he's on top now and has her arms pinned down.

Buffy: Get off of me.

Xander: Is that what you really want? (Buffy struggles a bit) We both know what you really want. You want danger, don't cha? You like your men dangerous.

Buffy: You're in trouble, Xander. You are infected with some hyena thing, it's like a demonic possession!

Xander: Dangerous and mean, right? Like Angel. Your Mystery Guy. Well, guess who just got mean.