There's no reason for you to feel any shame - except in advising leaving your wife for a younger woman as a strategy that most men should employ rather than actually working on the non-sexual parts of their relationship, which underpins everything else. The entire point of this piece is that what's going on in the relationship more generally has a HUGE impact on whether or not she's going to stay interested in having sex with you - Tris Harkness being a prime example of that.