Room service traditionally meant having food brought to your room whenever you wanted. Then room service began including spa treatments and massages. The latest addition to a handful of hotels' room service options is personalized scents for your luxury hotel room in Bangkok and around the world. 

It’s long been acknowledged that personal aroma is one of the most powerful subconscious determinants of whom we will take as a lover.

But the idea that smell might also be a better marketing tool than visual or audio stimuli is a more recent phenomenon.

“Scent marketing” – whether it’s the smell of doughnuts at Krispy Kreme, or cologne in an on-trend men’s retail store – is forecast to become a $1 billion industry within the decade, says Brown University adjunct professor and expert on the psychology of smell Rachel Herz.

“Humans have traditionally been characterised as quite low on the animal totem pole for scent sensitivity,” she says.

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