Not so fast there, long march! Better consult Darwin and Freud first. Of course, I will add my support to the fact that, at times, it truly is the purpose of one's life. At other times it just seems that way.
When an adult is incapable of distinguishing between appropriate behaviour with children and animal instincts something has gone very very wrong. Now maybe you believe that humans are merely animals. I do not. This is degenerate behaviour even on a really good day