61 things you should never mention to a ghost.
Although most ghosts
are fairly well adjusted to the spirit world,
occasionally they do feel a bit down. If you notice your ghost
guest starts to cringe a bit when you mention things like life,
blood, smelling flowers, touching, hearing, seeing... (Oh, dear,
I'd better stop here, or your poor spirit guide may become depressed
while you read this together)...anyway, try to avoid showing
too much joi de vivre while entertaining ghosts -- it really
is quite rude, if you think about it.