When I was 12 years old, I found out that my ham used to be a pig, and I didn't understand why I was eating it. I told my mom that I didn't want to eat animals. So I didn't. That's my vegetarian story.
I became vegan 10 years later, when I read that cow's milk was meant to be for the calve. At the time, I had assumed that cows, as a species, produced milk... it was just what they did. After I found out the truth, it felt completely unnatural to drink milk, or eat milk products.
Add in the moral, and environmental reasons ---
Simply----there is no reason to eat meat, milk or eggs.
Eventually I learned my diet was healthy, and could prevent cancer cell growth, and heart disease.. and I never looked back.
"I love animals. I don't want them to die. I don't need to eat animals to live. So why would I?"