What did Gandhi give up at the age of thirty-seven? Why?

At thirty-seven years of age, Gandhi decided to give up sex as a selfless act. Celibacy, or Bramacharya, has an important role in Hindu lore and life. Bramacharya includes restraint in sex, anger, diet and emotions. This decision by Gandhi is part of his transformation to a better, desireless individual. Clearing his mind and soul of personal needs and desires allows him to work for the common welfare. Once others believe the genuineness of Gandhi's renunciation, he will be deluged with their devotion.