I am reminded of fairytales about the fey, who would cry at weddings and laugh at funerals -- and get hit for it, and go home to Underhill because the humans were so horrible. But there wasn't anything wrong with the fey. They were just different.
So much of therapy is about forced affect. About training people to show what is expected, not who they really are. It doesn't help the way those therapists think it does. Some people have the same feelings as everyone else, but not at the same times and they may not show it in the same way. That's okay. They have the same right to express themselves as everyone else does.