There are different types of penile exercises and they work in different ways. Squeezing exercises help to increase blood flow to the penis. By squeezing your penis also known Male Enhancement Supplements as jelqing you build pressure inside the penis. It is this pressure that forces the penile tissue cells to break down. So the body then has to rebuild the damaged tissue cells and to withstand future squeezing, these new cells and bigger, and therefore able to hold more blood.