He's infected by it, doncha know...
Cloud now regularly references/prompts appropriate lines from Buffy episodes in our conversations. He just can't help himself.
Rullsenberg: "I can't remember the number without putting the note in my reminders, but that means using the keypad to get through the letters to the number keys"
Cloud: "why don't you use the letters instead, like they do in the states for words and phrases" (he grins)
Rullsenberg: "what, like '1-800 I'm-dating-a-skanky-ho'?" [note: have lost count how many times Cloud has referenced/prompted that line]
Also, though I cannot recall the context of the conversation, today Cloud actually used the line "did anyone else just go to a scary visual place?" and knew exactly the context it had come from.
See, we just love Willow in our house!