A counter point as well. Sex is an integral part of marriage. If she doesn't want sex she needs to speak up. If she wants sex she needs to speak up. Sure, he can agree and validate her but he also needs to realise that he's not dealing with a fully rational being. Her perceptions are her, by fully validating everything he is also perpetuating her idea that EVERYTHING she says is correct. It would be better if this type of thing was done through a counselor so that a more balanced view eventually comes out.
H, You own only 50% of the problems. You need to validate her concerns and don't argue (as OT says, no buts). You do not, however, need to personally agree inside that she is correct but you do need to let her voice be heard. Try to get her into counseling if you can because something doesn't ring true in her "always felt that way" statements. Seems she's painting you with a very wide brush.
