Swearing loves spelling. We abbreviate it online: WTF and GTFO. We encode it in military acronyms: SNAFU and FUBAR. We play with letters to avoid taboos: H-E-double-hockey-sticks. We spin apocryphal tales of sweary etymology: Ship High In Transit and For Unlawful Carnal Knowledge. Sweary spelling even graces some of our finest literature – like in Shakespeare, who humiliates a prude by making him spell out the word cunt.