Making a Sandwich

One day Little Johnny asks his Mum, "How come when I come in to your room you and you're on top of Daddy, you say you're making a sandwich, but after a while I come in again, you're eating a sausage?!"

Little Johnny and the Difference Between Boys and Girls

Little Johnny comes home from school with a note from his teacher, indicating that,  "Johnny seems to be having some difficulty with the difference between boys and girls," and would his mother, "please sit down and have a talk with Johnny about this." So johnny's mother takes him quietly by the hand, upstairs to her bedroom and closes the door. "First Johnny, I want you to take off my blouse". So he unbuttons her blouse and takes it off.  "Ok, now take off my skirt".   So he takes off her skirt. "Now take off my bra". Which he does. "And now, johnny, please take off my panties". And when johnny finishes removing those, she says, "Johnny, PLEASE don't wear any of my clothes to school any more!"

Little Suzie and Cake Baking

One day, little Suzie and her mom are walking down a beach when they see a couple having sex. Little Suzie asks her mother, "What are they doing?" And her mother replies, "They're baking a cake" so that she doesn't have to explain sex to little Suzie.
Later that day, after mom has tucked little Suzie into bed, little Suzie's dad comes home. Mom and dad decide to have sex on the couch.  
The next morning, little Suzie goes up to mom and asks, "Mommy, were you and daddy baking a cake last night?"
Mom replies, "Yes we were, Suzie. How did you know?"   Suzie replies, "Cause I saw some icing on the couch."