So much for the five-second rule. Another urban mommy myth bites the big one. Seems anything that drops on the floor -- be it the cookie or the soother -- is contaminated long before those five seconds are up. According to the medical director of the infection prevention and control program at Loyola University Health System, Jorge Parada. "When it comes to folklore, the 'five-second rule' should be replaced with 'when in doubt, throw it out.'"