Mohd, put 1/2 to 1 ounce of clove oil in with 8 ounces of kama sutra oil. Clove oil is sold in phamacies over here for toothache, but is mixed with mineral oil in Japan to make Choji oil ( choji = clove ) used to care for katanas.
In any case, one part clove oil to between 8 and 16 parts kama sutra "pleasure garden" oil. You can always mix it, add a bit more clove oil if you decide it needs more pungency.