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Straight edge refers to a subculture of hardcore punk which was a direct reaction to the sexual revolution, hedonism, and excess associated with punk rock.[1][2] In its simplest form, straight edge is a philosophy of staying clean and sober: meaning refraining from using alcohol, tobacco, and recreational drugs. For some, this extends to not engaging in promiscuous sex, following a vegetarian or vegan diet, and not using caffeine or prescription drugs.[1] The term was coined by the 1980s hardcore punk band Minor Threat in their song "Straight Edge."[3]