He collects Spider-Man and Conan the Barbarian comics.
And that's only the first on a list of "Fifty things you might not know about Barack Obama."
When working in a medium sized office setting, you tend to share links with your co-workers, and then forget to show your other friends. This is a demonstration of what a recent study claims we spend 25% of our office time doing (while maintaining or even increasing productivity). Our managers, on the other hand, would call them "distractions".