Addition
"Multiplication is just a short hand for addition. 3 x 5 is just 5 + 5 + 5, three times."
"Oh. It's just a fancy way to do addition."
"Yes. Anything that can be done with multiplication can also be done with addition. But in the long run, you are better off learning multiplication."
"But I've been doing addition for almost fifteen years. Addition feels natural to me. Multiplication feels just so weird."
"It will feel weird for about a year or two. After that, you will think multiplication is the natural way to think."
"This multiplication thing sounds like magic. I'm afraid that if I use multiplication, the person succeeding me will not understand my work. I'm sticking with addition."
A conversation overheard a few centuries ago, when Multiplication-Oriented Methodology were invented, supplanting Addition-Oriented Methodology forever.
Multiplication has its share of problems years later.