its because male and female genitalia arise from the same embryological structures, for instance the genital tubercle which becomes the clitoris in girls, becomes the glans penis in males, which is partially why the underpart is so sensitive
its because male and female genitalia arise from the same embryological structures, for instance the genital tubercle which becomes the clitoris in girls, becomes the glans penis in males, which is partially why the underpart is so sensitive