[Retric]

There is another popular view that replaces 'emotions' with neurochemicals. Basically, serotonin is an actual chemical with actual biological effects which fit's closely with specific emotions.

In this view emotions are shorthand to describe an incredibly complex system and as such fit biology into a social context. However, people's responses to said emotions fall under social conventions.

EX: Hunger is something you can directly study. But, peoples responses to hunger vary widely.

PS: This also extends to things like chemical intoxication. The loss of coordination when drunk is inherent, singing drinking songs is a social response.