This product is for external use only. Use twice in a day, apply it before sexual intercourse, The product does not have the efficacy of excitement and erection. Do not take it orally.20 minutes before making love, clean the sexual organ, wipe up water drops, take the product as required, apply it to penis stem, balanus and groove, and give massage to the penis slightly until the medicine is completely absorbed. The squeamish should clean the medicine with clear water 40 minutes after the application. It can help to prolong venereal time no matter what venereal form is adopted. It should be applied earlier; Otherwise the effect would be un-ideal. The efficacy can last for three hours. The beginners should use it less and increase or decrease the dose as required.