Apply right amount of the product on the penis and slightly massage to let the medicine be fully absorbed. It's suggested that if you use at the first time, apply it in little amount and increase with actual demand. The effect is different as individual as the person, and sometimes, expectations effect can only be achieved after using several times. How to use and apply to directly on the penis about 1.5ml (10 drops) once a day,then massage until oil is fully absorbed. It can also be used with any penis enhancing/enlarging/extending system for an adult less than 30 years old, its suggested you buy 4pcs for one course of treatment. Adult above 30 years old will require 6pcs for one course of treatment. Buying one or two pieces which is little is not advisable as it may not be very effective because this is not a hormone.