Dr. Cox: [laughing] You're right. But, you know... You know what else I hate about Kelso? His hair smells like a pet store.
Janitor: Oh, actually, that's my fault. I filled his hairspray can with dog sweat.
Dr. Cox: Dogs don't sweat.
Janitor: No?
Dr. Cox: No.
Janitor: What the hell am I putting in there?