Hairdog, The major difference I see here between you and Mr. PS ( and Mr. NJ as well) is that you, my friend, have tried every which way to address the sex issue in your marriage. There have been letters you've written, books you've given her, your iniatiation of MC, relationship talks ad nauseum, etc. My bet is Mr. PS did very little of this; he most likely stayed fairly silent, simmering with resentment while pretending everything was fine. And then found his solution: an affair.