These days, I can't even remember a lot of what I've forgotten. I have this theory that may or may not be related to having children, which is essentially that at some point, your brain reaches saturation point with information, and then starts to operate a 'one in one' out policy.
And who am I kidding? I blame it almost entirely on having children.
"You want me to remember that your kids need their PE kits and some money for a school trip which must be in tomorrow or they can't go, Blue has a gluten-free friend coming round for tea, and Pink is going to a birthday party?" (snarls my brain, as I attempt to sneak some more information in)
"Um, yes" (acts innocent)
"OK. I'll remember. But I'll ditch your nephews' birthdays. And that bill you needed to pay? The letter you needed to post? Forget it." Yeah - literally - forget it.