Biogenic XR The critical area that determines the gap and girth of your manhood, is called the Corpora Cavernosa. Some other words it is the two chambers that causes erection. When blood enters these chambers, then it's very retained there until ejaculation is completely finish. The Corpora Cavernosa doesn't get larger by itself and that's where stretching exercises come perform. By using various types of penile enhancement exercises, can be possible to stretch the chambers larger, over a long period of time.