Enduro Stack (Canada) What was stated in the particular ad about the natural male libido enhancer is that, the one-day usage of it will result to enlargement of the penis and even fuller erections. Another effect promised by the advertisement is that, the man who used it will gain more sexual stamina.The lesson here is to be careful and be clever enough in choosing the right male enhancement product. There are still effective and trustworthy brands, which men can rely on.o, how would you know that your chosen product is a legitimate one? It must have a proven track record. It means that it should have favorable testimonials from legitimate consumers, and not from imaginary ones.