Vagina (scabbard) indicates not only sexual needs. Often she symbolises qualities which deal in the farthest sense with mental-spiritual fertility, for example, creativity, imagination, intuition and ideas which should be promoted.
With primitive races the female gender organ is a symbol of the femininity which means at the same time maternity. Freud saw them in the dream analysis by all possible round and hollow objects shown. Modern psychologists interpret them as the female strength par excellence which also works in the man, so not as a pure sexual symbol.