I recently started drinking coffee (most) mornings. My spouse says, "It took three kids, but you're finally a grownup."
When reading a book about fire safety and fire trucks, Anthony (4) explained to me that, "Only grownups use matches. Just Daddy and Aunt Gina. Not Mommy or Nonna [his grandmother]."
Based on this evidence, you can decide whether or not I'm a real grownup.