Until last season, Game of Thrones fans probably put Jon Snow's sullen pout and dour disposition down to the fact most of his family have been murdered and he has to fight an impending battle with a demon ice zombie.
But actually, as we learned during his 'temporary death' scene at the Wall, it may have to do with something that has been driving men to try and prove themselves with swords (or sports cars) for centuries: having a small penis.
In the scene where he was resurrected by Melisandre, Tormund Giantsbane accuses the soon-to-be King of the North of lacking a little in Valerian steel.
Just a bit of Wildling banter? Not according to the show's producers, who have confirmed details of Jon anatomy.
Talking to Esquire US for their cover interview with Kit Harington, creators David Benioff and Daniel Weiss said: "He just had the look. The brooding intensity; the physical grace; the chip-on-the-shoulder quality that we always associate with extraordinarily short people.
"There has to be some downside to being Kit Harington, right? It's impossible not to like him. Maddening. The one thing we can do is saddle his character with a tiny pecker."
So there you have it. He may be impossibly good-looking. He may be about to unite the Seven Kingdoms. Hells, he may yet sit on the Iron Throne for good. But Jon Snow doesn't have it all.
This story originally appeared on Esquire.co.uk.
* Minor edits have been made by the Esquiremag.ph editors.