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Pamela Wible, M.D., helps prevent bloody nipples at the 2014 Eugene Marathon, where nearly 6000 runners from 17 countries took off at 6:00 am to run 26.2 miles. That's a lot of chafed nipples, a common health hazard of long-distance running—especially for male nipples. Watch the proper technique for applying Dr. Pam's Magic Nipple Gel. :)