Alan Hirsch , the neurological director of the Smell & Taste Treatment and Research Foundation in Chicago, noticed that people who lost their sense of smell also had a diminished sexual appetite, so he tested men and women to see what scents might increase blood flow to the genitals.
Although men responded sexually to all of the aromas, the greatest response came from a blend of pumpkin pie and lavender, which increased blood flow to the penis 40% of the time. The scent of pumpkin pie with doughnuts increased blood flow 20%.
