maths teacher

A boy was teaching a girl mathematics... 

He kissed her, then kissed her again and said: "This is addition". 

Then the girl kissed him back and said: "This is subtraction". 

Then they kissed each other and said: "This is multiplication".

Suddenly
the girls father came and beat up the boy, threw him away and said: 
"kwasiakwa", to wit, foolish, this is division I dont want to see you 
here gain and that is long division.