It's very difficult to defend himself to Buffy and growl at Angel at the same time, but Spike is going to try his hardest.

"It's not sexual tension!" he tells Buffy. "It's... normal tension! Hatred! I don't like him." Except that, okay, they're friends now, but one shocking revelation at a time.

He turns to Angel and slips into gameface, growling back. "And I can't understand you calling me names when it's in Irish, you git."