I saw an experiment where they sprayed male pheromones on 1 of 12 chairs and they asked 12 females to sniff the chairs and then sit on one. 11 sat on the pheromone sprayed chair.
In other experiment they had 4 people put cotton pads under their arm pits and showed them one of 4 films - one to evoke a fear response, another a love response..etc.
Then 4 people where asked to sniff the pads and identify what emotion each person was feeling.
They could quite accurately identify most of them. The one who could identify all 4 emotions accurately practically shoved the pads up her nose. I was more focused on holding back my gag reflex than the results.