Young people are busy again, but also love the body, some times do not fight hard, insist. When you have a bowel movement, go to the convenience, otherwise the anus through the sphincter and other contractions plus rectal flap, stool can leave the anus, back to the top, thus staying longer, because of the human body temperature, so that the water evaporates, the stool will become dry, the stool becomes difficult. Likewise, men should not hold their urine, otherwise it will lead to prostate enlargement in the long term, outside of the urine, but also because of the proximity to the anus, the bowels may also not be smooth. The actual fact is that you can find a lot of people who are not able to get a good deal on this.