Vegetarianism is not for me but I respect it!  It involves not eating the flesh of any animal.
What do vegetarians eat if they don't eat animals?
There are different variations of being a vegetarian, but generally fruits and veggies, beans and other things that are grown.  Some eat eggs and dairy.
Oh wow, I guess it's not for me either!  How do they get their protein?
I imagine that's why some vegetarians add the eggs (ovo-vegetarians) or dairy (lacto-vegetarian)!  Soy is also an option
Can that be healthy?  I always thought eating meat was important in order to get iron and protein!
It can be done healthily or not!  People must decide that their ethical objections to eating meat overrule the easy protein (and deliciousness).
How long has vegetarianism been around?