Is this your first?

One thing that has struck me as a little odd, is that practically every stranger that encounters me and LadyBug and takes the time to oooh and ahhh over her, asks "is this your first?"

How do they know? Do I have "rookie" emblazoned on my forehead and I just can't see it? Is it the carrier that still smells like plastic and hasn't seen the wear and tear of previous siblings? Is it my deer-in-headlights smile? Is it the puke that has found its way once again down my cleavage? (I SWEAR that she thinks its a garbage chute - because there's an awful lot of places she could spit up, but she almost always chooses the breast slot).

I surely don't look young enough to be a first time mom - and this point I'm old enough to have 18, just like whats-her-name on tv. But it IS my first and it makes me think these people are clairvoyant. Maybe its just because there isn't a toddler hanging onto my sleeve or the stroller is for one, and not two? Do second-time moms get this, too?