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.