He wondered why religious people wanted to deny or suppress a natural biological urge. He wanted to find out what happened to that urge if he did not do anything with it. Why do I want to indulge in auto-erotism. I don't know anything about sex. I have never gone to a movie or seen anything of a sexual nature.
All stimulation apparently comes from outside.
But there is another kind of stimulation which comes from within. I can cut out all external stimulation. U.G. had not experienced sex but he says that even then he seemed to know what the sex experience was. Since his aim in those days was to become an ascetic or a monk, he did not entertain the thought of marriage. He saw for himself that though he thought of gods and goddesses he had wet dreams.