The pelvic floor is made up of layers of muscle and other tissue. This forms a sling or hammock which stretches from your pubic bone at the front to the tailbone at the back. This hammock is essential for the support of your pelvic organs, for normal bladder and bowel function, for sex and for postural support of your pelvis and spine. When the muscles of the pelvic floor contract they tighten, or close, the openings in your pelvis (urethra, vagina and anus). This is important in maintaining continence and enhancing sensation during intercourse.