From The Golden Bough:
"In some parts of Amboyna, when the state of the clove plantations indicate that the crop is likely to be scanty, the men go naked to the plantations by night, and there seek to fertilise the trees precisely as they would impregnate women, while at the same time they call out for "More Cloves!" This is supposed to make the trees bear more fruit."
Which explains no doubt the desperate, guttural cries of "More Lambs!" heard throughout the Spring in Scotland.