One day I had this niggling doubt that I continued to be a vegetarian for cultural rather than ethical reasons. I tested that hypothesis by eating a hamburger. It was literally the worst thing I had ever tasted. I had to try hard not to throw up and offend my hosts.
Then I tasted bacon, hot dogs pastrami sandwiches and fried chicken and I understood why people like meat. That continued for a few more months.
About six months after the hamburger episode, I had another epiphany that I don't like eating animals since I don't like animals being eaten. I turned vegan. All's well that ends well.