5 years old won't get pregnant

..in a kindergarten class, a little gurl ask: ma'am! do 40 years old get pregnant?

yes! the teacher said.

Gurl: How about 20 years old?

Ma'am: YES

Gurl: How about 5 years old?

Ma'am: NO!

( a little boy whispered to the gurl )

Boy: SEE! I told you not to worry.