There is nothing wrong with partners who choose not give up their own self-determination in order to support a community they have played no part in making.
Designer Relationships is a gentle, compassionate read which presents the subject in a most decorous and acceptable light, yet this also means it is not dramatic or compelling enough to encourage a dubious reader to finish it. This is not a book which will persuade those without an already open and curious mind.
But for those who are monogamous – especially as explored in Twice – the paradigm of a monogamous male with a polyamorous female – the struggle is wholly different. Society emasculates their stance as they struggle with opinions which may define them as cuckolds, whilst shame and guilt compound the difficulties.