what distinguishes a girl from a boy?

Brelee says to Mommy:
Mom, our baby look like a boy.

Mommy says,
Why? (thinking...Well, she is just wearing a white onesie and has no bows on right now.)

Brelee responds:
Cause she doesn't have black things on her eyes.  (she meant eyelashes!)

Mommy then showed her Emali's eyelashes.  They are there, just not as thick as Brelee wanted to see.

She then proceeded to give Wesly a hard time about his amazing eyelashes (that she thinks are for girls).