The second strategy is the "Reciprocity" method.
In all my years of performing fellatio, I have observed one constant, each man likes to be pleasured differently.
What you really need is more advanced info on exactly WHY women give head, what motivates them to go down on You and how You can get your wife literally ADDICTED to giving you head.
But don't think for a second that the ladies are free from my lustful chokehold.