BBC: Antelope's sex signal in the knee
To demonstrate their sexual prowess, peacocks spread their tail feathers, men flex their muscles and eland antelope, it seems, click their knees.
Story of my bloody life. How come human females aren't turned on by clicky knees? I'd be a major heart-throb!
(Not that I'm not already, you understand.)
I thought I'd try clicking the fingers at the human female as I don't seem to be able to click my knees at will. Readers may be interested to know that doesn't work either.
A nifty click of the fingers accompanied by the words 'get us a drink' failed to have the desired effect. It had some effect but not the desired one you understand.