Could this study provide the real reason that we tend to shake hands when greeting another person? People shake hands partly to smell each other’s odour, a new study suggests.
Handshakes are actually socially acceptable ways for people to communicate using smells.
The new study found that people spend more than twice as long sniffing their hands after a handshake.
Hand-sniffing is covered by bringing the hand up to touch the face — for example, by pretending to scratch.