The Manual - How to wolf whistle

1. Press your thumb and index finger together until the tips of the nails are touching.

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2. Put the fingers in your mouth to about 5mm depth.

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3. Position your tongue so that the tip touches the point of your two fingers.

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4. Blow (keep your lips moist but not wet for maximum effect).

Words by Stephen Millar, All-Ireland Wolf Whistling Champion.