Yes. I don't think they're really shutdowns. I can go on with my business, for weeks or even a few months at a time without feeling anything deeply. Sometimes I just feel nothing at all, and that's when I don't talk very much. I *can* talk when I feel this way but it's hard work. I just have nothing to say.
I don't think I feel things deeply most of the time, really. There are times when I feel something really deeply, probably more deeply than most people but then I go back to being sort of a blank slate.
It's not like I have zero emotion the rest of the time, I usually seem pretty happy because, why shouldn't I be? It's easy for me to feel happy when I don't really feel anything else.
There are emotions, somewhere, it's just that if I don't *need* them, I don't have them. If something serious happens or I'm concerned about someone else, my emotions come into play. I feel most of the things other people feel, but maybe not in most situations. All of my real emotions are reserved for when they are truly needed.