Dear Pure Heart and Mind --
I think that would depend on how you wish to apply discipline. If you wish to control someone, then in most cases, i would say that you would apply it to your hands. If you wish to metaphorically or actually step on someone, apply it to your feet. It could also be used to dress any article or object of mastery or discipline.
In addition, remember that the word "master" has another meaning -- to thoroughly learn a topic or be able to accomplish a feat, as in mastering long division or becoming a master of martial arts. So in these cases, Master Oil could be applied to whatever body part used in training for and attaining such accomplishments.
Master Oil
Use in Magic:
Master is a conjure formula said to powerfully aid one's ability to control situations and people. Master spiritual supplies are for personal mastery, strength of character, leadership ability, and power popular with those who wish to increase their personal power
Spell Methods:
Use oils to fix candles, prepare magical amulets, anoint the body and hair, add to bath water and floor wash, and dress furniture and rooms, according to folk magic spell lore.
Product Details:
Hand-made, faith-based, perfumed hoodoo dressing oil with herbs and roots included, in a 1/2 oz. glass bottle with a colourful label.
OIL-HOO-MAST
Master Oil
$10.00
You can order right here in the Forum by clicking on the blue Add To Cart button.
For more information, see:
http://www.luckymojo.com/master.html
Good luck.