The best contraceptive is the word "no" repeated frequently.

The line frames contraception less as a medical technology than as an assertion of personal boundaries. By elevating “no” to “the best contraceptive,” it emphasizes consent, refusal, and the power of repeated boundary-setting in sexual situations—especially where pressure, coercion, or unequal power dynamics may be present. The phrasing is deliberately blunt and didactic, functioning like a slogan: it suggests that the most reliable prevention of unwanted sex (and thus pregnancy) is the ability to decline and have that refusal respected. It can also be read as social commentary on how often women are expected to accommodate persistence, and how normalization of “no” is central to sexual autonomy.