This is a well known line from Rudyard Kipling's poem The Female of the Species. Kipling wrote this poem, and it was originally published in 1911. The title and refrain of the poem was used as a title for at least three other works.

The poem, The Female of the Species, begins with illustrations of the greater deadliness of females of different species. It looks at the Himalayan bear, the cobra and the native American, who frightened Jesuits (an order of priests) more than men. It continues with the general thought that women must be deadlier than men; every female is formed with the one purpose of motherhood. Kipling held that women have the greater determination, the greater courage and single-mindedness to pursuit all the important things that make life worth living.

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