I'm skeptical of the practice, but it may be adopted for various reasons.
Which of the particles are you talking about?
I was referring to vegetarianism. It's the practice of abstaining from poultry, seafood, and any animal flesh.
I see. I have never been one or met one before but I do not believe in vegetarians 
Vegetarianism is an old idea dating back to ancient India and Greece.
I see. Many things comes from the Greek people. Which of other things do you know comes from Greece. 
Greece is so cool. I want to visit the nation's capital and largest city of Athens.