PENIS TRACTION EXTENDERS - HOW THEY WORK. Penis traction borrows an idea which from the medicalcommunity's perspective, has been in development for over 30 years. The basicprinciple is that when stress is applied to a specific body part over asustained period of time, that region will gradually grow new cells, includingtissue cells, and in doing so, will expand in size and volume. In the case of the penis, the application of traction gentlystretching it causes the cells which make up the Corpora Cavernosa and theCorpus Spongiosum within the penis to swell, break down and slowly multiply tofill the space created by the stretching. In doing so, the penis slowing growsin both length and girth. Gains in solidpenile tissue are added to by the increased blood volume which the now largerblood vessels are able to accommodate.