haha! Clearly that's the reason. Darn those angry dragons, scaring people away.Are you sure it's not black mould? I can't tell from the photo; but black mould is meant to be feared, so it might be worth checking out.That, or appease the dragon some other way; snacks perhaps?
Whoa, that black stuff looks like mold. You need to get that checked out ASAP! If it's ON the ceiling, you can be sure that it's IN the ceiling too.
Yeah I would say black mold, especially since its the bathroom.