Why do people steal pictures?

I don't know what you mean becuase I went to one my friend's profile and saw these pictures of my favorite singer crying in both of the pictures. Well I liked the picture and save them into my computer to look at them and e-mail them to my cousin. Then I put them with all my other pictures in myspace. I didn't do anything wrong, I just happened to like those pictures and put on mine to look at them when I wanted to.