There are a few games that absolutely confirm that we are all horrible monsters who totally lack empathy: Grand Theft Auto, any Bethesda release, and - most importantly - The Sims. While we engage in needless acts of violence in all these games, The Sims is the only one where treating characters with cruelty isn't rewarded in any way. Yet putting your Sims into a pool and removing the ladders so that they'll drown is such a widespread phenomenon that it's a full-fledged meme. There are few that would be able to say with an honest conscience that they've never boxed their Sims in a wall until they've starved to death. It probably has something to do with your god-like status as world creator and distributor of free will - absolute power corrupts absolutely. Although sometimes you just have to kill your subjects, because - c'mon - it's so annoying that they're constantly pissing themselves.
There's more fanfiction on the internet than traces of grain alcohol in Amanda Bynes bloodstream. Untold numbers of people devote countless hours of their lives to writing scenarios where Professor Snape makes out with Gandalf while Luke Skywalker does unspeakable things to a Tribble. But that's hard - writing takes a lot of time and (unless you want to spend a lot of time animating your horrible sexual fiction) the result will only be able to be seen in your imagination. Well, with the Sims you can have Saul Tigh fall hopelessly in love with Sherlock Holmes, and any other number of weird combinations that will all end in WooHoo's and heartbreak when they all die in an unexpected mac 'n cheese fire.