I wouldn't dare say that to a colleague or friend, because although they might appear to take it well, I don't think I'd be doing our relationship any favors. I

I wouldn't dare say that to a colleague or friend, because although they might appear to take it well, I don't think I'd be doing our relationship any favors. I'd step out with an excuse instead. But given my lifestyle, I almost never have to be around anybody who's eating, except in contexts in which I can't hear them eating (busy brunch, say).