You can call me NIK
It varies for me depending on what we covered. I can be a righteous bitch after IC, especially if it was challenging or hit a raw nerve.
I notice the same thing with DD after her therapy sessions. The deeper the work, the more difficult it is for her to control her emotions afterward.
Does he recognize he does this? Can you talk with him about how to handle it as a couple? Maybe he needs some processing space for a couple of hours. Or maybe a physical outlet - like going for a run?
"The dark does not destroy the light; it defines it." - Brene Brown