Manly Singing

There may be adolescent boys who are opposed to singing because it doesn't seem manly enough.

These two video clips may be of some use -- even if they do nothing more than to give some courage to a music teacher who has to face the formidable opponents of such boys in a music class:

Non nobis, Domine is sung by the victorious troops after the Battle of Agincourt in which their opponents had been heavily favored.

Men of Harlech was sung in the Michael Caine film, Zulu, as a response to the Zulu war chant when the British were about to be overrun by the tribal warriors in the Battle of Roarke's Drift.