I've never had kids, but I have a very good memory going all the way back to year one, and I remember exactly what kind of lying, manipulative, destructive, mean, self centered son-of-bitch I was, in detail.
And I was a very good boy, comparitively. I understand girls are differently viscious, but really not much better.
Maybe that's why I've never had kids.
Most adults seem to have drunk the water of forgetfulness somewhere between 18 and 22, and can't remember childhood. I guess this is natures way of assuring a next generation.