Female orgasm is defined so that every woman can imagine she might have had one. No one can name any female erotic turn-ons. Either different women are assumed to respond to stimulation of different anatomy or the same woman is assumed to respond differently on different occasions. No one justifies the different anatomy involved in intercourse (the vagina) and masturbation (the clitoris). The clitoris is equated to the glans but this is not the kind of clitoral stimulation that causes orgasm.