Why old 'friends' Munster and Leinster should always meet up over Christmas

This is the third straight year that the meeting of Munster and Leinster has been back in what surely has to be its rightful place. 

RIVALS: Irish legends Paul O'Connell (Munster) and Brian O'Driscoll (Leinster) in their December 27th, 2006 meeting.

ODD how an idea can form and stick regardless of fact. It feels now as if the Munster-Leinster Christmas meeting in Thomond Park has been a staple of the holiday period for years. 

As synonymous with the season as the last-minute dash for Cranberry sauce and hideous jumpers.