do some people actually not feel emotion?

After decades of marriage, my husband told me he doesn’t know what people are talking about when they speak of love. He says he has never felt love for anyone (not his parents/sibs/me/our kids). I know he has a sense of duty and responsibility to “be a decent person,” but he sees no need for emotion. Is it possible that some people actually don’t feel emotions? (By the way, I am a very emotionally expressive person and know that if I want to be hugged, I need to ask. It’s not a problem and yet sometimes I wonder what it would be like to be with someone who felt/expressed emotions.) Thank you