In males, the suspensory ligament of the penis is attached to the pubic symphysis, which holds the penis close to the pubic bone and supports it when erect.

Surgically cutting this ligament allows more of the penis to hang outside the body, thereby increasing its length. Thus unsupported, it tends to point downwards when erect, and may wobble undesirably.

External links

• The Mayo Clinic -- Penis enlargement: Fulfillment or fallacy?

Exercises:

PC Ligament Stretch - Work yourself up into a semi erect (Tumescent) state. Create a ring around the penis with your thumb and middle finger. Starting at the pelvis side of the shaft, slightly tighten the finger ring and draw it out towards the head (glans penis). This will pull the blood towards the head and make it extremely hard and full. Hold this position for 5 to 10 seconds and while holding the ring just before the head pull slowly and gently away from you as if you're lengthening the shaft. Do 20 reps, each rep with a 5 to 10 second hold for 5 sets. (Don't make the ring too tight, and don't yank or tug)! This exercise will not only stretch the PC ligament over time but it also help to break up fibrosis (binding scar type tissue) inside the spongy cavity that prevents it's full engorgement and expansion with blood.

Kegel Contractions - Sit on a tennis ball or handball placed in-between the scrotum (testicle sac) and the anus. For 3 minuets contract the anus and the muscles you would use to stop the flow of urine. Hold each contraction strongly for 10 seconds. (Not easy is it)? This exercise works the PC muscle mostly; this is the muscle that controls premature ejaculation. The work also gets the IC and BC muscles.

Wall Ups - Sit at the edge of a chair or toilet seat. Make your penis fully erect. Now hang a small towel over the penis and contract the muscles to make the erection stand all the way up against the resistance of the towel. Hold the up position for 3 to 5 seconds. Do 5 to 10 reps for 3 to 5 sets. This exercise though mostly for the PC muscle, will also strongly contract the IC and BC muscles. Since they wrap around and hold tissue together instead of going from one joint to another and moving things, the only way to strengthen the IC and BC muscles is through isometric contraction when contracting the PC muscle. In fact since they all have the same nerve supply it's not possible to voluntarily contract the IC and BC muscles without PC being involved. As you get stronger add resistance by wetting the towel or by using a larger towel.