Sex Education Class joke

A 2nd grade 'Sex Education' class is asking the teacher questions about sex.

A girl asks the teacher, "Can my mother get pregnant?" The teacher replies, "How old is your mother?" The little girl answers, "36." The teacher says, "Yes, your mother can get pregnant."

So the litle girl asks, "Can my older sister get pregnant?" The teacher asks, "How old is your sister?" The little girl replies, "19." The teacher says, "Oh my, yes, your sister can get pregnant."

The girl asks the teacher, "Can I get pregnant?" The teacher asks, "How old are you?" The young girl replies, "7 years old." The teacher replies, "Oh, no, you can't get pregnant!"

The little boy behind her pokes her in the back with his pencil and says, "See? I told you we had nothing to worry about!"

har!har!har!