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When a birth control method is not used perfectly, every single time, the entire time. Many birth control methods will state their effectiveness rates with either “typical use” or “perfect use”.

One way of describing a reproductive system that includes (or originally included) testes and a penis.

People whose age in years exceeds the legal age of majority, people considered to be adults by law, or people who a culture or individual considers to have reached an adult stage of life.

An equitable distribution of advantages, assets, and benefits among all members of a society.