When you were a young boy did you ever do cruel stuff?

I've often wondered why I blew that frog up. I could never do anything like that these days. What is that in all of us? Was it part of Barbarian Hordes coming back on me. To this day I feel like a jerk. I'm not mentioning the psychological games I played with my cat and that mechanical mouse. Girls didn't seem to get into this entertainment. Mostly they did things too each other like pouring syrup in some pretty things hair. Just human nature?