Hi Mau
You say that, but that poses quite a bit of a problem in the winter: if the sneezing is too close to a house... no more house. Hence health and safety operatives from the times before King Arthur have banned us to caves, deep ones, made in stone. Difficult to burn, stone.
Dragons, being reptiles, should be cold blooded of course, which would be a problem in the winter. However the blood of a dragon passes nearby an organ, behind the lungs, which creates a very hot and volatile liquid substance. This is the green liquid which takes fire when blown outwards... and enables a dragon to keep warm.
This also enables you to identify a proper dragon as opposed to a pale imitation: The flame of a proper dragon has a green tinged to it, due to the color of that liquid (sometime referred to as wildfire): any yellowie/orangie flamed ones are just not to be trusted and frankly not worth the bother.
Now female dragons are hard to come by these days, so this is difficult to verify (and my childhood memories go only as far back as when I burned my first knight), but according to George R.R. Martin, who wrote "Game Of Thrones", it is very clearly stated Dragon's eggs, or at least their shells, are made out of stone. I suspect this is to prevent breathing accidents at birth. The thought of a female dragon delivering a stone egg however, conjures some images in my mind which makes me cringe and close my eyes...
This could be the reason we are near extinct you know: I have never heard of a midwife surviving a Dragon's delivery to tell the tale and I guess any sensible Mrs Dragon would say "Already been bitten once, sunny boy, stay away or I will burn you!".
Anyhow I thought it was good to clear that up...
