The Last Nine Years

I walked into the 4th floor restroom; my music lit professor was in the room and washing up.

B: "Jarom!"

Me: "Yes?"

B: "This is going to sound sarcastic, but has this room always been here?"

Me: "Uh, Yes..."

B: "Oh!" "It isn't new then..."

Me: "Not really, It's always been here."

B: "Oh, ok." "Do want to know when I discovered this room?"

Me: "Today?"

B: "Today..."

He turned to walk from the room but I had to react.

Me: "This is going to sound sarcastic back, but how long have you been here?"

B-very crisply: "Nine years."