Very good question! Especially in a time when most live their whole lives without introspection.
I was 28 when I ventured into this world, so I had a pretty good understanding of who I was and my purpose regarding men and intimacy. So when I came into the decision to become a Companion, it was a natural extension of my femininity and beliefs. I've never been one for one night stands and emotional conflict in my real life. Companionship takes the emotional issues out of the picture.
I still have the 'for love or money' philosophy I had then, and respect the woman in me that would rather be intimate with a man she admires (even in some small way) than a stranger.