Just as aphrodisiacs have been marketed for centuries, synthetic drugs and human biomolecules are now being laboratory-designed to counter perceived personal deficiencies, such as moodiness, memory deficiency and perceived physique deficiencies

Appeals to neutral principles may not provide much assistance in guiding decisions about enhancement. The claim that there is something "unnatural" about such interventions is not a very pervasive argument against them. For there are many ways in which nature can be defined as the enemy, particularly when it limits our reach, in physical or intellectual terms. Indeed, Many interventions might well be justified on the ground of extending nature's bounty, along the lines of oestrogen therapy for post-menopausal women