My father, who was born in 1893 and volunteered to serve in WWI, sang the "Mary Ann" song like this:

"Pull your shades down, Mary Ann (who could be seen combing her golden hair, which was haning upon a chair) continued like this: "if you want to keep your secrets from your future man, Pull your shades down, Mary Ann!" My father attached that ditty to this one:

Keep your head down, Alamein! Keep your head down, Alamein! Last night in the pale moon light, We saw you ... We saw you! You were mending your broken wire - As we opened rapid fire! If you want to see your father in the father-land, keep your head down, Alamein!" Note: The broken wire refers to trench which separated the two opponoents.

When he returned safely to America (home was in Cliffs, Idaho), a party was held in his honor, and he sang those two songs. One lady sniffed at the vulgarity. He told her, "These were the "clean" ones. You would not want to hear some of the others.!