I thought it was funny 'cause I could relate to Dr. Brule's eating habits since I myself am eternally biased when it comes to vegtables (like Brule, I dismiss 'em as "rabbit food") & I also have a tendency to dismiss fish (mostly tuna) as "cat scraps"
Fortunately, I DON'T spit milk on my food to cool it down, I just wait awhile if it burns my mouth.
I also laughed at the ending where the next show's host shows up early, Dr. Brule says "I'm tryin' to do a show here" & the host of the next show says "Could you please go?" right before freezing picture for closing credits.
I also liked the "Parody of bad public access" concept (i.e. tape stretching, poor editing, technical glitches)