Why do the All Blacks stumble on big stage?
Why are the All Blacks so good at the bits in between World Cups?
I read a sport psychology paper recently that said the surest way to lose is to put pressure on yourself to win.
If both teams have winning as their goal they can't both succeed; all you can do is scrutinise your performance and maximise that effort instead.
Winning might just happen as a consequence of getting your performance right.
Which explains, your honour, how most rugby coaches talk to the press just now.
When I was a kid growing up in Malaysia I wanted to be an All Black. There was something about these tall, glum, hard-hitting men that intrigued me.
There was Kirkpatrick; add to that Meads, Lochore and Whiting and they seemed to be from a different planet.
A planet exclusively for well-built blokes who liked fights and standing on people; the only thing they didn't stand on was ceremony.
Back then rucking with "sprigs", or studs to you and me, meant that you ended up looking as if a herd of baby elephants had been tap dancing on your back with the soles of their feet covered in thimbles.
In fact, there was a machismo to the whole thing. I am glad rucking like that is a thing of the past.
The only person who doesn't play rugby in New Zealand is a little girl called Amy who is three-years-old but the country's arm wrestling champion.
David Kirk captained the Kiwis as they won the tournament.
Since then? Cue tumbleweed.
So I was watching the TV on Saturday morning as they demolished Australia. I mean, they just blew them off the pitch.
It's very simple stuff. Forwards who are ferocious and give maximal effort each time they go into contact.
A two-hit and then wide game to centres and wingers who are strong enough to stand up in contact and offload or at least make some ground.
I love Kiwi rugby, it's a blueprint for the rest of us: conditioned athletes who explode in contact light up the pitch.
There's beauty along with the brutality. You have to trust your instincts that, just as in the sevens, some of the best sport scientists are looking after these people.
So what goes wrong at World Cup time? Why has the best rugby team in the world not won the World Cup for more than 20 years?
Is it because their country expects them to win? And is that pressure too much? I wonder.