Toward, away, against

There are three things you can do with a bid.

Turn toward it. This is very cheap. A word, looking up, an mm, anything at all. It does not require enthusiasm.

Turn away. Not hostile. You did not hear, or you heard and stayed on your phone. This is the common one, and it is the one that does the quiet damage, because nothing happens and nobody complains about nothing.

Turn against. What, can you not see I am busy.

Almost all of this is happening on ordinary afternoons when nothing is wrong, which is exactly why nobody works on it.