weirdest conversation yet

So I had the weirdest conversation yesterday.  I was dropping of the LG to my parents for a short visit on my way to work, when I realized I had forgotten to pack some milk for an afternoon snack.  So I dropped by a quickie-mart to pick some up.  I was really perplexed, because they only had Fat-free and 2% lowfat.  I guess there isn't a big demand for whole milk at this little neighborhood store.  

Anyway, I was a little flustered because I was already going into work late, and I just wanted to get the milk, drop her off, then head into work.  There 2 guys paying for stuff with the cashier, but they are totally going over the bill, so it's taking a little while.  And there's another guy waiting.  So he sees me with the LG in my arms and a quart of milk, and so he kindly says, "oh, go ahead, I'm just buying vitamins."  

Me: "Thanks!"

Him: "Is she yours?"

Me: mentally scratching head - as I have heard (read on blogs and adoption boards) these types of conversations often happen in line at the grocery store - "uh, yeah."

Him: "She's cute."

Me: "uh, thanks."

Him: "she's pointing at something outside."

Me: "uh, yeah, she does that sometimes."

We quickly pay, then leave.

The first time ever I've had an "is she yours" conversation.  People who know she's adopted totally say she 'passes' for bio.