I agree when the dogs sigh or the cats sit on my lap & purr, but all that means is that they're happy.
As for the face eating thing, that freaked me out - but what freaked me out more is that it happens!!!! I heard 2 pugs were eating their owner a few weeks ago!
If they truly loved us, they wouldn't eat us - would they??
lol.
If you were on a deserted island and your friend died and you were hungry would you eat him? It may take you a few days but eventually you might look at him and decide he would taste pretty yummy with ketchup!