Once upon a time many moons ago I was searching ebay, what for, I cannot remember.
I ran across an auction for "My Left Nut"......
Being one that enjoys a little sarcastic humor and practical jokes, I contacted the seller to learn the story behind the auction.
Seems he had experienced some recent success, selling miscellaneous items from around the home, and while discussing his new found revenue with office mates someone suggested, "I bet you could sell your left nut on Ebay".
Thus, he listed the item in the same manor as this one, as an exercise in social behavior with any proceeds received to be donated to charity.
I still bust a gut today as I recall the story....thanks for the reminder.