Dr. Alan Hirsch, Director of Chicago's Smell and Taste Treatment and Research Center, says the key to a man's heart, and other parts, is pumpkin pie. Out of the 40 odors tested in Hirsch's study, a mixture of lavender and pumpkin pie got the biggest rise out of men ages 18 to 64. That particular fragrance was found to increase penile blood flow by an average of 40%. "Maybe the odors acted to reduce anxiety. By reducing anxiety, it acted to remove inhibitions," said Hirsch.