The Navy sent me to college in the V12 program in 1944. Marching past the girls' dormitory singing the bawdier versions of 'Bell Bottom Trousers', 'She Wore a Yellow Ribbon' and 'I've Got Sixpence' drew a loud "Knock It Off" from the Chief. After half a dozen paces in silence a voice from the middle of the formation started "Jesus Loves Me, This I Know". Works well.