Now new research from Northwestern University suggests that humans also pick up infinitesimal scents that affect whether or not we like somebody.

“We evaluate people every day and make judgments about who we like or don’t like,” said Wen Li, a post-doctoral fellow in the Cognitive Neurology and Alzheimer’s Disease Center at Northwestern’s Feinberg School of Medicine and lead author of the study. “We may think our judgments are based only on various conscious bits of information, but our senses also may provide subliminal perceptual information that affects our behavior.”

— from Subliminal smells bias perception about a person's likeability in physorg.com, with thanks to Sondra for the link!