What my 5- and 7-year old daughters call
breasts. They witnessed their little
twin brothers breastfeed, and therefore have
no doubt as to the function of mammary glands on a human.
Mommy, look -- my
dolly is having some of my milkies. (her
shirt is up and the doll is "nursing.")
This is not "sick" -- it is a healthy thing that the daughters are learning what to do when they have a baby.