Video games have a lot in common with porn. That's not meant as a criticism -- some of the best minds in the business have compared the two as a way to advocate on behalf of the creative merits of both. But here's the thing: once you accept that video games are often structurally similar to porn, what does that say about actually playing them? Plenty of people have already described video games as "masturbatory". Whether or not you think that's a fair description or a good one, it helps explain why many people think games are so much fun.