The highly sought after male attribute in which they have the seemly unnatural ability to "last" as long as the ladies. In other words, they have the ability to hold off their orgasm in order to come when their partner does, resulting in a much more satisfying sexual experience for both parties involved.
Guy 1: "Dude, I totally busted out the Hour Power last night on that chick I met at the party."
Guy 2: "How did she react?"
Guy 1: "She was all like: "Oh, Oh, Oh," you know what I'm talking about, "Oh""