Some people are turned on by hairy breasts, brows, buttocks, balls and all else, some are not. You will undoubtedly meet some of both kinds on your trip through life. There is no foolproof method of either encouraging or discouraging its growth. The majority of human beings touch themselves in ways that bring erotic pleasure - that is women, men, children, babies, single folk and those with sex partners. If she sighs or he moans you're probably doing something right.
Sex is a pleasurable activity.
If something hurts something is wrong. Then see a doctor. A few urologists specialize in surgical methods of enlarging the circumference through fat injections and the length through cutting the suspending ligaments, but there are problems with these methods. A man is much better served by learning how to be a good lover with what he has rather than wishing it otherwise. Heterosexual, bisexual, lesbian and gay can all be far more fluid terms than you may think.