Brm ! Brm !

Brm brm noises are
genetically predisposed
by the brm brm gene
on the Y chromosome.

Little girls rarely speak
this very strange sound.

Little boys know it
without being taught.

Four wheeled vehicles trigger
brm !  brm ! while being pushed
across the floor. As soon as
he sees one every little boy
knows to say “Brm !  Brm !”

Little brother has no big
brothers to teach him
only big sisters who do not
say “Brm !  Brm !” as they
draw pictures and dance
around in princess dresses.

Yet he still knows to say
“Brm !  Brm !” when pushing
his trucks across the floor.

Brm ! Brm !