Tiny, to tell you the truth, I can't answer your question. There isn't any scientific literature that proves that penis exercises work for enlarging the penis. The penis isn't a muscle, so exercising it won't increase its size. The exercises you talk about work on the principle of trying to stretch the sponge-like structures in the penis (corpus cavernosa) by over filling them. In theory this should lead to varicose-like veins in the penis and not an increase in penis size. Personally, I don't believe that they work because otherwise all people that masturbate frequently will have large penises and we know that isn't true. Good luck.