The question JOhn asked was what did we think about the fact that he had never SEEN these wonders. I predict that if you are very, very good JOhn, and we all send our strongest magic, a big band of lady banjo players and gentlemen recorder players will wake you up early on Christmas morning. Wish I was there to arrange it.
As for the sex bit - the union of a recorder and a banjo would result in something really horrible I imagine. Maybe a skin full of air with a pipe attached and a blowing tube, and a loud voice. OOOH! so that's how they came about!
(I don't actually think they're horrible at all, and some of my best friends play them).