Perhaps. Or else they are weak, maybe from old age.

[Who knows how it worked with them though? He was just a human being and as such had to use a human frame of reference, no matter how ill suited it was to the discussion.]

Then again, it could be that it's food for them. Or maybe it makes them stronger, like one of those energy drinks they have around here.

You would know more about that sort of thing I would think.