Dr. Kelso: So, the Janitor still doing the picture thing, huh?
Dr. Cox: I beg your pardon?
Dr. Kelso: Well, every time he would ask me for a real office, I'd say no. So, now if anyone gets a nice, new office, he gets very angry and he uses that picture to drive them insane.
Dr. Cox: Oh. Now what the hell does a janitor need an office for, anyway?
[meanwhile, in the supply closet:]
Janitor: [on the phone] So you wanna discuss the urinal cake issue on Thursday, huh? Let me check my calendar. Alright, Steve. I'll.. huh? What did they do? Oh, hey, good one. A little racist. Yeah, you- You know what? Um, just give my love to Darlene, okay? Really? Syphilis, huh? Well, that's- I'm not a doctor, Steve, but... That seems unusual, even for syphilis.