Genes and evolution
People look for different rewards when referring to their careers. Some look for pay raises and others look for validation. Some people even look for compliments as a reward.
first to all, i expect i will gain more expericence.
Some maps of the world might look different than others because of the date the map was made. It also might be different because of the maker of the map.
Because different people value different things.
Everyone is different.
Many people have very different tastes of beauty. For example, some people think blondes are prettier than brunettes. But then others think brunettes are prettier than blondes.
Because everyone is different and has different talents.
Different people have different levels of risk aversion
Because some people have different beliefs then others.
because she just does. Some people look like others.
Yes, you can be pregnant and not know. Some people have different bodies than others, and if you look the same, and are pregnant, you wouldn't know. Some people can be nine months pregnant, gain 10 pounds or so, and just look chubby, and they might not know.
Everyone's level of pain is different. Some people handle it better than others. Just concentrate on how good you will look when it is all done.