"Except when you've got a sticky doughnut in your hands".
Hey, that's not a donut! It's a bit too tubular, and not yet sticky! :P
:-O
And I thought you just came with plastic underpants and a trademark.
</red dwarf>
Well if you want accuracy, xen's example is also an approximation. Over a very long period of time the approximation improves. Just like for rivers.
I thought it was fecking interesting anyway :-(