We have reached the age of categorization.
There are 2 types of people in SchmoopyBoy's world at the moment - babies and non-babies. Anyone clearly not an adult is a baby. Or, I should say, "Baby!"
Infant - "Baby!"
Three or four year old neighbor walking with her mom - "Baby!"
Seven year old neighbor walking his dog - "Baby!"
Teenage neighbor practicing riding his skateboard - Not an obvious adult and therefore, "Baby!"
I'm not sure if these people particularly appreciate being pointed at and called "Baby!". Fortunately people tend to forgive (or ignore) people SchmoopyBoy's size when they don't get it quite right.