Hmm. It's hard to say. Everyone's idea of a happy childhood is different. The DID could block out the unhappy memories from his consciousness so he perceives his childhood as a normal upbringing. But it's hard to say without talking to the individual.

I may or may not have DID. I believe I have had a happy childhood though I do have bits of memory of abuse. I also know what I remember is incomplete and fragmented. I have all the signs of PTSD because of stuff that went on in my childhood to young adulthood. I hope this is helpful to you understanding this man.