My Partner Claims He “No longer notices women.” Is that possible?

In this episode Mark and Steve take on an issue that is more common than you might think. A PBSE listener wrote in about her partner who claims that "He no longer notices women because he's had a change of heart." Yet, his behaviors (some of them secret) appear to indicate otherwise. Is it possible for a guy to no longer "notice" any other woman but his partner? Is this even the "right" question to ask? Where should the focus be in real, effective and lasting recovery and in healing betrayal ...