H's memory was not good when he got back...he honestly thought he visited son a lot and that he called him as often as he could...he even missed his first speaking performance in a school play! He also told his sister that he was busy most weekends with S...I can count on ONE hand the number of visits he had with our S...
I think not only do they lose their mind, they lose all sense of time, space, place, people, and love...
I did tell him one time that he would wake up sober enough and realize that all his THINGS (he was spending a lot) would not replace his children and he would deeply regret all of it...I think they turn off as a self preservation of sorts...