This massive, nearly incomprehensible economic miracle you are witnessing outside your window is due to one group of people and one group of people only – men. And it was a transaction (the most important and original economic transaction) that incentivized men to make and build nearly everything on the planet - sex for resources. Men build things, women give them sex. Men produce things, women give them children. Men accrue wealth and resources, women continue their genetic line. Sex (or more Darwinistically speaking, progeny) is what gets men out of bed in the morning, off to school, into rush hour, off to the office, off to the factory, off to night school, off to war, or off to the lab to make money so that they might someday attract girls. If there was no sex, if there were no women, if there was no female youth and beauty, men would still be living in caves, only mustering their resources to perhaps create beer and poker to bide the time. Alas, the ONLY reason you have planes, trains, and automobiles, the only reason an economy exists, the only reason anything outside the sky exists, is because men built it. And men built it in exchange for sex.