Tonka bean, Dipteryx odorata, absolute has a wonderful aroma reminiscent of caramel and vanilla. Coumarin, a mood enhancer and anti inflammatory, lends Tonka beans their properties. Combine it with geranium and vanilla for a euphoric effect.  When it is used in perfumes and aroma blends , also use essential oils such as Patchouli, Sandalwood, Rose,Litsea cubeba, Lemon peel, Lavender and Styrax. Sensual blends may include Ylang ylang, Jasmine, and Patchouli. Tonka becomes a lighter note blended with Rose, Lavender or Myrtle. For PMS, add Chamomile and Neroli with Tonka bean. Tonka is often used in soaps and personal care items. Use small amounts in topical blends only. It is  toxic internally. Use Tonka bean to pamper yourself externally only. I do not recommend it for pregnant or nursing mothers, or for children.