X Last Plus I think perhaps the best natural penis enlargement exercise is from a proven system called penisadvantage. This system has a very good reputation and is very credible. It is 100% all natural. The product has been in existence for the last eight years and has help thousands and thousands of men achieve more gains in their penile area. It has a staggering success rate of 99.8% and continues to prove itself again and again!pumps are actually an aid for impotent men. The vacuum devices can help men obtain an erection, but once again, no size gains will occur.