It is the reason why Dafydd Jenkins, the lock who became the youngest captain in Six Nations history last season, believes age matters less than attitude.
Particularly not on a frantic Friday evening in Paris when Wales, last year’s wooden spoonists, have to enter the bubbling cauldron of the Stade de France.
Lock on a daunting Six Nations, handling injury, why Welsh players should play in the Premiership and family pressure.
Successful patella tendon surgery last summer has fixed the problem but a concurrent shoulder operation has been taking longer to overcome.
If you are squeamish and wonder about the stoicism needed to play top-level rugby this may be a good time to skip a paragraph or two.