A quote from a conversation with my 5.5 yo daughter, Emma, who was trying to usurp my chocolate milkshake from Whataburger:
Emma: "Mommy, can't I just slurp straight from your cup?"
Me: "No, Honey. I'll share with you guys, but I'm going to put it in another cup so we're not all sharing germs."
Emma: "But why, Mommy? I can't get a baby in my belly from drinking from your straw, can I?"