'None taken.' Crowley waves away the remark with a louche nonchalance ordinarily restricted to responding to things like, No offence, but you have terrible taste in films, or No offence, but your flat is a tip, rather than accusations of murderous intent. 'I can assure you, I have no intention of killing anybody. Nasty habit; I try to leave that to others. 'Sides, this is a lovely-- if entirely improbable-- dream; I wouldn't want to spoil it.'

He realises that this is perhaps not the most reassuring motive for not wanting to kill people (though truly, he is genuinely repulsed by pointless brutality; not something he likes to go around advertising), but he's amused by how on-edge Spike is. He can't help it if it's fun to poke at his paranoia.

'You got a name, vampire?'