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Currently taking an online class in neuromarketing (how the brain reacts to marketing) - wanted to share a few mind-blowing nuggets about the senses 
- Smell: Leather largely has no odor. A majority of what we know as the smell of leather is very intricately designed with lots of chemicals. The leather shoes you love are, again, your brain tricking you. Same with leather couches.
There's also a theory behind casinos and lemons - if you ever smell a slight odor of lemon in a casino, it's very intentional. Studies have shown lemon odor increases risk taking, especially for men. They want to catch you at your weakest.
- Sound: The sound your mouse makes when you click? The sound your smartphone makes when you slide it open? All highly designed. Mercedes apparently spends hours just optimizing the sound of the car door closing for consumers to recognize it.
- Touch: Luxury electronics brand, Bang and Olafsen, uses an extra wad of aluminum in their remote controls to make them heavier. Why? Tactile branding studies shows weight makes our brains believe heavier items are more sturdy with better quality.
Duracell once made batteries shaped like bullets that never made it to shelves - they were far heavier than the average battery. In focus groups, almost everyone said the battery was far superior even though there was no evidence to suggest this - it may have even been weaker
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