As the world's population hovers between 6 to 7 billion people, different societies have various strategies to control their population growth.
China, for example, has limited families to one child (with some recent exceptions in rural areas) and that has had the consequence of female infanticide which has led to a dramatic shortage of available brides for young men... a socially dangerous situation.
Other nations, such as Italy, have suddenly found that they have a declining population as young people have rejected the large family, village oriented lifestyle of their parents for the urban-chic, singles approach to fun and fortune first. There, young men will live with their parents for food and laundry services and keep a little place for entertaining young, willing women.
Other areas such as the Middle East have prolific birth rates which apparently are kept under control by sectarian warfare or "jihads" against "infidels".
Mexico, with the largest Spanish-speaking population of any country in the world (over 100 million), shuns infanticide, birth control pills or condoms, and warfare, so they have come up with a uniquely Mexican approach to birth control:
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