Mr. mouthology

A Professor was traveling by boat. On his way he asked the sailor:
“Do you know Biology?",the sailor answered; No sir!The professor laughed,  and said 'you are a living dead boy".
After a while  he asked the sailor again, do you know Ecology? what about zoology, Geography, physiology?
The sailor said no to all his questions. The professor was so disappointed and scorned him saying;
What the hell do you know on earth. You will die in your ignorance...
But as nature would have it, storm caught up with them and the boat started waving and about to sink. The Sailor in turn asked the Professor, do you know swiminology & escapology from sharkology?
The professor said no i don't get you.
Sailor said “Well, sharkology & crocodilogy will eat your assology, headology & you will dieology because of your mouthology.

Moral;
Do not take unnecessary advantage over people even if you have an edge over them.