Does marriage and/or having kids make you stupid?

Or just forgetful? Or is it just old age?

Am I the only one who must write EVERYTHING down (to-do items, groceries, upcoming events) or risk running out of milk or sanity or underwear? (And no, that is not a rhetorical question. I really want to know.)

As I recall, back in the day (i.e., before getting married and then having my daughter), I never wrote anything down -- not phone numbers, not appointments, not groceries, not "remember to pick up the dry cleaning," nothing. Kept it all in my head -- and never forgot anything. Now? I keep a list in every room -- and constantly ask people to remember to remind me. (Though for some reason, I still know the lyrics to "Escape," aka "The Pina Colada Song," and dozens of phone and license plate numbers, many of people whom I barely know.)

Moreover, I often find myself blurting out utter nonsense that has nothing to do with the brilliant, well reasoned thought or statement I had meant to articulate.

So, is marriage and/or children to blame? (Always good to have a scapekid, i.e., a little scapegoat.) Or is it just old age?

While (briefly) researching this post, I could not find any scientific evidence that marriage makes you dumber (fatter? yes; happier? yes; dumber? no; though apparently sex makes you stupid, but considering how rarely most married people have sex, I don't think it applies). However, I did find this highly amusing article about kids making you dumber on Salon titled "Is my kids making me not smart?" which I am sure many of you parents can relate to.

Anyway, let me know your thoughts via the Comments.