It's the same thing that drives people to want to experience sexual pleasure or have one too many drinks. We all want to experience the other, and to get out of our daily existence. ↗
Public opinion is a permeating influence, and it exacts obedience to itself; it requires us to drink other men's thoughts, to speak other men's words, to follow other men's habits. ↗
It is a sign of a dull nature to occupy oneself deeply in matters that concern the body; for instance, to be over much occupied about exercise, about eating and drinking, about easing oneself, about sexual intercourse. ↗