i'm fully aware of that

however I can't control for it here. Furthermore, I suspect that trends are easier to remember. So if your mother fed you dinner at 5pm each night, you're likely to accurately remember that fact 20 years down the road. If she hugged you when you got back from school each day, you're likely to remember that 20 years down the road. If she didn't have a habit of being affectionate with you enough that you'd remember it decades later, then she likely wasn't very affectionate with you.