The underrated sense of smell: its influence on emotion and behaviour
The sense of smell is, in evolutionary terms, the oldest of our senses and plays an important role in our lives that is often underestimated. Scents and odours have a direct line to the limbic system, a part of the brain responsible for emotion, memory and learning.
Influence on emotion and well-being
- Odours can influence our mood, evoke memories and calm or stimulate us.
- Pleasant scents can promote feelings of happiness and relaxation, while unpleasant odours can cause stress, disgust or even nausea.
- Scents can also shape how we are perceived and, for example, make us appear more attractive or likeable.
Sexual and social behaviour
- The sense of smell plays an important role in sexual behaviour and the choice of a partner.
- Pheromones, scent substances secreted by our body, can unconsciously influence our attractiveness.
- Social interactions are also influenced by odours. For instance, from a person’s smell we can draw conclusions about their health and emotional state.
Physical reactions
- Odours can trigger various physical reactions, such as the release of hormones, a change in heart rate or an increase in breathing rate.
- Unpleasant odours can bring on nausea and retching, while pleasant scents can aid digestion.
Conclusion
The sense of smell is an underrated sense that has a major influence on our emotions, our behaviour and our health. Scents and odours can affect us in many ways and improve or impair our quality of life.
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Last reviewed: July 2026