There are some things we do as parents that would've grossed us out before we had kids.  But, sucking on their pacifier.  What?

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It seems sucking on your infant's pacifier could protect them against allergies. That's according to research reported in USA Today news which says,

while distasteful – maybe literally, depending on where the pacifier's been dropped – could protect infants from developing allergies.

The research presented at a yearly meeting of the American College of Allergy, Asthma, and Immunology added that it might be because,

 Mothers who clean pacifiers by sucking on them have infants with a lower allergic response.

The study interviewed 128 mothers for just over a year and a half.  Moms were asked how they cleaned the pacifiers.  It seems the moms that spit-cleaned had babies with lower allergic reactions.