The Interpretation of Dreams by Sigmund Freud Chapter 5 Page 21

He states: “Is there a symbol which (if in any way permitted by the phantasy) may not be used simultaneously in the masculine and the feminine sense!” To be sure the clause in parentheses takes away much of the absoluteness of this assertion, for this is not at all permitted by the phantasy. I do not, however, think it superfluous to state that in my experience Stekel's general statement has to give way to the recognition of a greater manifoldness. Besides those symbols, which are just as frequent for the male as for the female genitals, there are others which preponderately, or almost exclusively, designate one of the sexes, and there are still others of which only the male or only the female signification is known. To use long, firm objects and weapons as symbols of the female genitals, or hollow objects (chests, pouches, &c.