Here is a riddle for you. When is a cat not a cat? The answer is easy if you have met Piccolo.
Just one look at his vast orange tummy that always touches the ground will tell you this is not a normal cat. Piccolo thinks he is an ordinary cat, but it is official that this is not the case.
A short while ago, Piccolo paid a visit to the doctor's and after a thorough examination the doctor told poor Piccolo he was a monster, not a cat. The doctor was so shocked by what he had found out during Piccolo's medical examination he had to take the rest of the day off. It is not every day that a doctor discovers a monster in his surgery.
What effect did this terrible news have on Piccolo himself? Well, none really. Piccolo decided not to let the doctor's diagnosis change his life.
If he continued to behave like a cat no one would notice he was a monster and there would not be any problems. And if anyone dared to mention the 'M' word in front of his face, Piccolo knew exactly how to deal with them.
He would put them straight that he was a cat and nothing else. Easy peasy.