There was a time when you couldn't walk down a street without hearing someone whistle.
But it's still rare to hear a good woman whistler. So is there a different female approach to whistling and why don't women do it as much?
Sheila Harrod is a former world champion whistler and David Morris is the current international male grand champion. They join Jenni to talk about their differing techniques.
On 14 April Shelia gave a whistling masterclass at the Manchester City Art Gallery. She was invited to the gallery to provide an interactive feature to the Disguise exhibition, which runs until June.
