Increasing your "ropes" during an orgasm

What are "ropes" to do with orgasm?: "In the European sexual underground, the term ropes applies to the number of physical ejaculatory contractions a man has during an orgasm. Undeniably, the more contractions (ropes), the longer and more intense the orgasm. In a normal orgasm, most men experience 4–7 ropes and while results certainly vary, most men who take Ogoplex insist that their ropes have increased significantly!"