Why saying nothing seems sensible
I don't want to start by telling you to communicate better. You've heard that, and it misses what's at stake. The wish to be understood without speaking isn't silly. There are good reasons for it.
Being known is one of the best things about closeness. You've had a friend hand you a cup of tea at the right moment, and a partner who could tell from the way you put your keys down how the day had gone. Those moments feel like proof that you matter to someone, more than any declaration could. Wanting more of them is natural.
It used to happen more. Early in a relationship people watch each other closely. They notice moods, remember small preferences, and ask twice. You remember being read that way, and you may remember reading them. So the expectation isn't invented. It's based on a time when it was partly met.
Asking feels like a loss. If you have to say "I've had a rotten week, could you do bedtime," it can feel as though the offer is worth less when it comes. You wanted it to come from them. Chapter 9 takes this seriously, because I think it's what holds the whole habit together.
Asking is exposing. Stating a need means admitting that you have one, and risking a no. If you signal instead, you've risked nothing. Should they fail to notice, you can tell yourself you never asked.
You may not want to be a burden or a nag. You may have grown up in a house where asking for things was frowned on, or where one parent's needs took up all the room. Many people come out of that determined never to be demanding.
And sometimes you don't know what you need. You feel wretched, and you couldn't say what would help. Part of the hope is that the other person will work it out for you.
I think the silence is trying to meet four needs, and this list is mine. You want to feel known. You want care that's freely given. You want to avoid the risk of asking and being refused. And you don't want to be someone who makes demands.
All four are reasonable. My argument is that the habit serves them badly. You end up feeling unknown. The care you wanted doesn't come, because the other person doesn't know it's wanted. You avoid the risk of being refused, but the verdict you reach hurts more than a refusal would have. And in the end you come across as demanding anyway, in ways that are harder to live with than a plain request. The other person gets moods they can't explain and cupboard doors closed hard. They also seem to be failing a standard that nobody has told them about.