Topic: Why do people downvote?

I have been a member for a several weeks, maybe a month, time is irrelevant to me~<3, and I have noticed that some people will downvote a comment that is positive towards the picture and its artist. I am very intrigued by this behavior. Is it a need to make others feel bad? Or simply trolling? What makes you downvote a comment? Please put your answers down below~<3

Updated by Calcutta