I know that the English set a special value on humour.... during the war...some of the troops used to go over the top shouting "Marmalade!"..like an heroic battle cry.
The German never got use to it...
Because a German cannot conceive that a man in battle would want to be funny, you see.
But I think the English were dissembling the horror of their situation so that whey would not notice how close they were to death.