Came across a lady this morning with her dog, as one does. The dog had a ball in his mouth, as I had. The lady said we both had balls. I wasn't sure what she was referring to.
Then Stephen Fry was talking at lunchtime on "Fry's English Delight" on radio 4 about cliches and the derivation of the phrase "the Dog's B*ll*cks". You can see further suggestions here: http://www.stephenfry.com/forum/viewtopic.php?t=3019. I am now totally confused.
And for your amusement, here are some interesting piccies: http://www.400smilesaday.co.uk/.