Authors:

You transition as a mother from literally just pulling a booger out of that person's nose whenever you see one until at some point they assert: "No, I'm a person. You can't fix my underpants on the subway."

"Tina Fey Reveals All (And Then Some) In 'Bossypants'". "Fresh Air" with Terry Gross, www.npr.org. April 13, 2011.
You transition as a mother from literally just pulling a booger out of that person's nose whenever you see one until at some point they assert: No, I'm a person. You can't fix my underpants on the subway.