Smells can inspire, arouse -- and drive you mad

By Belinda Goldsmith

NEW YORK (Reuters Life!) - Chocolate chip cookies baking in the oven. Fresh cut grass. Your spouse's natural body odor. Smells can invoke memories, sexually arouse people, or even drive you mad.

Psychology professor Rachel Herz from Brown University in Rhode Island has spent 17 years studying the human sense of smell, finding it is the most emotionally evocative sense and the one most closely tied to mental health and happiness.

In a new book, "The Scent of Desire," she argues Michael Hutchence, frontman of Australian rock band INXS, may have been driven into a deep depression after losing his sense of smell in an accident which may have contributed to his 1997 suicide.

"This is a famous rock star who had everything but lost his sense of smell. This, in some people, can trigger a serious depression that gets worse over time," Herz told Reuters ahead of the release of her book this week.

"Smells really can alter and influence our moods and behaviors. There's no question that from a rudimentary survival basis vision is the most important sense for humans but for quality of life it is probably the most important sense."

Herz said she was struck by the importance of smell when acting as an expert witness in a court case for a woman who lost her sense of smell after suffering severe head injuries in a car accident.

The woman, who was aged in her 20s with a good career, explained how losing her sense of smell affected everything in her life from her ability to be a homemaker, to being intimate with husband, to her paranoia about her body.

"That really hit home with me," said Herz.