http://www.qwantz.com/archive/001049.html
I was looking backward through the Dinosaur Comics archives and I found one I missed. T-Rex is supposedly intrigued by impossible fetishes. Which he then uses to segue into a discussion about thermodynamics the next day.
Interesting that we got mentioned above other impossible fetishes.
Dino-boy fails to realize that most (more like all) of the other notable fetishes out there are also impossible to attain.
So, his fail in his logic.
Caution: this user is a new guy in training.