At 60 years of age two stools a day and normal in nature and color are normal stools. Feces is the residue of unabsorbed food that is formed when it is expelled from the digestive tract. Twice a day is normal if there is no thin stool, blood in the stool, water content greater than 85%, or abnormal stool color. If there are abnormalities in the stool, such as black stools, there may be gastrointestinal bleeding, blood in the stool suggests that there may be intestinal inflammation and other diseases, and if the water content is more than 85%, it suggests that there may be diarrhea. If you have abnormal stool symptoms, it is recommended that you go to the hospital and ask your doctor to make a judgment.