On March 22, 1972, the Supreme Court ruled that a Massachusetts law forbidding the sale or distribution of contraceptives to an unmarried person lacked a rational basis and violated the Equal Protection Clause of the US Constitution.

In 1967, after a lecture at Boston University in a prearranged violation, William Baird gave an unmarried 19 year-old woman a condom and contraceptive foam. Sheriff Thomas Eisenstadt of Suffolk County arrested Baird and almost five years to the day later, the case had wound its way through the courts to the ultimate ruling, where six out of the seven sitting Supreme Court Justices ruled the Massachusetts "Crimes Against Chasity" law unconstitutional. The lone dissenter, Chief Justice Warren Burger, did so on the basis that they had been insufficient evidence given about the safety of vaginal foam, so he felt there wasn't enough grounds to strike the portion of the law requiring it to be distributed by doctors and pharmacists.

(h/t @PicassoKat)