Male orgasm is achieved by massaging the blood flow (tumescence) within the corpora cavernosa of the phallus. Interestingly, the clitoral organ has similar structures. Both the cura and the corpora cavernosa are common to both the penis and the clitoris. This not surprising since both organs develop from the same genital tubercle in the foetus. Female orgasm was a secret for so long because it only occurs when a responsive woman masturbates alone.