I distinctly remember my first experience of this kind of sick mind....
I was about 7 years old and I was out catching Common Lizards (Zootica vivipara) on a local hillside. I had caught a beautiful male which I was going to take home for my two females.
I was approached by three 'big boys', maybe 10 or 11 years old. They took the lizard off me, and were teasing me with it. Then one of them just pulled it in half... just for fun. I was really shocked, at that age I didn't understand how or why anybody could do such a thing.
I flew at the boy and got myself a good kicking into the bargain.