8 Surefire Ways to Drive Your Childless Friends Insane

"You'll understand once you have kids" should never, ever, ever (ever, ever) come out of your mouth. Maybe she doesn't want kids. Maybe she'd love to have kids but hasn't met the right person or gotten pregnant yet. Regardless, this is really obnoxious. Save the in-the-trenches motherhood stories for your mom friends — if you don't think she'll care and/or "get it," spare her the dirty details.