...you argue with a three year old over whether or not his eyes are blue and then pull out your phone and take a picture, on the spot, to prove you're right. (then look on the computer and realize that the picture is lot more grainy than it was on your phone)
...while combing a girl's hair you ask if she knows why you came into the world. When she responds, without missing a beat, "To be our mom" you tear up a little and scold yourself for ever, ever complaining about this gig.
...you can't sit down to eat a sandwich for three minutes without being tugged at, pulled on and stared at with eyes that say "hold me, mommy!"
...you sometimes grab a nine year-old boy and sit him on your lap and talk to him, the whole time wondering how on earth he got to be SO BIG.
...you realize that nearly everything you write as your status update on facebook includes something certain kids have said or done. You want to stop boring people but you kind of can't.
...you laugh and cry both with and about the same kids pretty much every day.
...you love to read, write and talk about children and parenting, even with people you have never met before, on a regular basis.
Now, I'm not saying any of these criteria apply to me, I'm just saying that I'm pretty sure I'm a mother.