Mull of Kintyre test

Kintyre is highlighted in red. The "Mull of Kintyre" properly refers to the headland at the southernmost end, but in this context the apparent angle of the whole peninsula is the relevant standard against which a penis would be compared.

The Mull of Kintyre test or Mull of Kintyre rule is, according to an urban legend, an unofficial guideline that was used by the British Board of Film Classification (BBFC) in the United Kingdom to decide whether an image of a penis could be shown. According to the myth, the BBFC would not permit the general release of a film or video if it depicted a phallus erect to the point that the angle it made from the vertical was higher than that of the Mull of Kintyre, Argyll and Bute, on maps of Scotland. The BBFC has denied that this test existed.