A lot of business designs are about manipulating human nature

1/ There are rarely windows in shopping malls, so you don't easily realize that it's already dark outside
2/ Bars rarely have clocks, so you forget the time and unknowingly stay for several hours
3/ Supermarkets place milk in the farthest corner, so you have to walk through aisles and end up buying more items
4/ Fast food restaurants play fast-paced, energetic music, so you eat faster and leave sooner, making room for the next customer
5/ Coffee shops play slow, relaxing music, so you stay longer and are more likely to continue ordering
All are carefully designed