12 Things You Do That Your Childless Friends Hate

In theory, snagging sold-out tickets to a hot concert is the highlight of the month for moms who've grown accustomed to rocking out to such jams as "The Wheels on the Bus" and "The Itsy Bitsy Spider." In practice, the idea of getting dressed for an evening that starts — not ends — at 10 p.m. is a waking nightmare. But the worst offense is how we consistently think we'll be up for it until the day of, when we inevitably back out ("the baby's got a bit of a temperature . . .") and leave our friend in the lurch.