Nagging?

I'm trying to figure out why every man I have ever known has told me that they can't remember to do something unless they're reminded to do so, and yet women are categorically referred to as "naggers."

I don't know how many of you out there have had this experience, but Rich and I have had to work out a system where I need to remind him weekly that I need time to clean the litter boxes or he simply doesn't remember to offer me that time.

I also have to remind him to watch the baby to give me time to take a shower, make dinner, take out the trash, etc.

Now, I understand that it wouldn't occur to him normally to say, "Hey honey, why don't you go take a shower and I'll watch the baby," although he has done that a few times after I've reminded him throughout the day that I need a shower. And while he has only rarely snapped at me that "he knows" when I tell him something needs doing, he has never called me a nag. So I appreciate that in him.

What I don't understand is that I have polled some guys and most of them have replied that they in fact won't simply remember something unless reminded. So why are we called nags at all?

I have a feeling the answer lies with the fact that men (and all people) can have a tendency to project their feelings onto others. I might be wrong, and if so, feel free to remind me of that or I'll never remember.