To an outsider, to a child watching, it looks like eating. There is no realization that individuals are concerned. But they are, even at the last, though the fact may be not be evident. The nature of the act is that we must not remain self-conscious, it is destroyed if we do. Of course, to the child the act is comic, but it is not to the adult because he knows that spirit is involved.
Literature makes people fornicating self- conscious and so violates the nature of the experience.
War and work are dealt with dramatically, not lyrically. You often get people writing poetry when they fall in love who are not moved by their other equally important experiences to do any writing about them. It isn't at all because love poetry has any practical value. No one was ever seduced by a beautiful poem, though a bad one may be effective on occasion. Work and war are less subjective, they can be imposed on one for pragmatic reasons.