Answer:
The letter S is added to pluralise most words in the English language. eg. Letter to Letters Word to Words and Language to Languages. But I am a word that is pluralised with the addition of the letter C.
I'm not really more than holes tied to more holes; I'm strong as good steel, though not as stiff as a pole.
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves everyday
I am a celebrity fish.
When I am caught I am thrown away. When I escape you itch all day.
A little house full of meat, no door to go in and eat.