My husband's understanding about therapy, but it's taken time to get to this place. Most of these concepts: transference, attachment issues, etc. are foreign to non-clients, and even to many clients really. The concepts are both complex and reading about them can easily lead to misconceptions, because there are so many varied interpretations, and both have some concerning aspects, so... I'm not surprised by his reaction. I'm curious what it is you want him to know about you and your therapy and why, and if focusing on that might give you a clearer path to reach him.