I should say there are a lot of nasty people who share revenge or child porn. I'm not talking about these assholes. Nor am I talking about people who post their own homemade consensual stuff. I get that impulse. I'm talking about people who find a picture of a woman's big butt then they go and post that pic elsewhere on the internet. An internet forum or a chan or /r/booty. Why do they do that? And, running the numbers, there must be thousands of people spending their free time posting free pornography. Why? Is it porn altruism or do they get something from this exchange. What is that impulse?