One day there was a t-rex. Then a spinosaurus came and said, "Do you want to be friends with me?" The t-rex said with a grin, "Yes, I would like to be your friend." The next day the t-rex stepped on the tail of the spinosaurus on purpose. "Oowwww, you're not a good friend," Spinosaurous said. Then they weren't friends anymore. 
Choose your friends wisely. 