My wife had the same problem with me for about 2 years... it's a really really addicting game... when you ask him to cut back try asking him to stick to 1 or 2 raids a week and 1 heroic a night (he'll understand what that means)... my wife did that for me, and once i cut back that little bit, i pretty much just lost interest in the game... i still play from time to time as a stress relief or just for fun, but i don't just sit there for 5 or 6 hours a night like i used to... but yes, jennaorgana is right... it's an extremely tough habit to break.