If you are not acquainted with the use of essential oils for romance and health, here is a basic introduction:

Essential oils are the concentrated essences of flowers, herbs, fruits, and plants that have aromatic, medicinal, and therapeutic properties. Essential oils may be used in a romantic setting as perfume, as a room freshener or mood enhancer (to be dispersed with a room nebulizer), to correct excessive sexual desire, and to energize lovemaking.

Essential oils are meant to be used on the outside of the body. They must be diluted with another oil, preferably olive oil or apricot kernel oil, but canola oil will also do.