A new study has found at least some evidence that sucking on your kid's pacifier can provide substantial protection against allergies and asthma. The findings are, of course, controversial and even the authors admit it's not conclusive. We would do this occasionally when Olivia was little, and she is mostly allergy-free. Of course, that could also have something to do with growing up in her very own petting zoo, so even we can't provide even anecdotal support for any of this.