Hey! When I am walking down the street with my baby, and she's babbling at all of the passersby, I know it's the cutest thing you've seen a day (her, not me, although I'm pretty damn cute if I do say so my damn self). This little ten-month-old is trying to explain something to you while eating her toes...yes, objectively, that is cute. So, smile dammit. Don't just walk by pretending not to notice...I know you saw her; so acknowledge the cuteness.
You don't have to stop and chat; you don't need to ask how old she is (10 months), does she have teeth yet (no), does she sleep through the night (yes), how long does she sleep (12 hours, typically)...just acknowledge the cuteness.