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.

The child and his mother.

A curious child asked his mother: “Mommy, why are some of your hairs turning grey?”

The mother tried to use this occasion to teach her child: “It is because of you, dear. Every bad action of yours will turn one of my hairs grey!”

The child replied innocently: “Now I know why grandmother has only grey hairs on her head.”