I have noticed about hub that he gets very defensive when he gets found out, because half the time when he's done silly stuff, then lied to cover it up, he has no real idea why he did the silly thing in the first place.
Come to think of it, there was one incident, years ago, where he contacted another woman online... I found out by chance because I was cleaning out the internet history and went ballistic at him (this was before either of us was diagnosed). He had no idea why he'd done it, but to him 'online' wasn't the real world, so it wasn't real in his mind. I think there was also a hefty chunk of the idea that 'everybody else has left me, so you will too sooner or later' involved. Once I got through to him that to me it was real, and that it hurt massively, he was horrified, and he never did anything like that again.
Come to think of it, there was one incident, years ago, where he contacted another woman online... I found out by chance because I was cleaning out the internet history and went ballistic at him (this was before either of us was diagnosed). He had no idea why he'd done it, but to him 'online' wasn't the real world, so it wasn't real in his mind. I think there was also a hefty chunk of the idea that 'everybody else has left me, so you will too sooner or later' involved. Once I got through to him that to me it was real, and that it hurt massively, he was horrified, and he never did anything like that again.