Liane Moriarty said this quote

It seemed to her everyone had too much self-protective pride to truly strip off down to their souls in front of their long-term partners. It was easier to pretend there was nothing more to know, to fall into an easygoing companionship. It was almost embarrassing to be truly intimate with your spouse; because how could you watch someone floss one minute, and the next minute share your deepest passion or tritest of fears? It was almost easier to talk about that sort of thing before you’d shared a bathroom and a bank account and argued over the packing of the dishwasher.