MOUTHOLOGY

A Professor was traveling by boat. On his way he asked the sailor:
"Do you know Biology, Ecology, Zoology, Geography, physiology?
The sailor said no to all his questions.
Professor: What the hell do you know on earth. You will die of illiteracy.
After a while the boat started sinking. The Sailor asked the Professor, do you know swiminology & escapology from sharkology?
The professor said no.
Sailor: "Well, sharkology & crocodilogy will eat your assology, headology & you will dieology because of your mouthology.