This is something we've noticed with our two. The boy particularly HATED
tobacco smoke - if you lit up when he was on your lap he'd jump off straight away and
throw you one of those withering looks over his shoulder.
I'd say we still avoid breathing the vapour directly onto them, just seems polite - but they don't seem to mind it at all. The only downside is they don't get to watch smoke curling from the end of our analogues any more. Cats always seem to be fascinated by these examples of turbulence and chaos in action - even if they loathe the smell!
