[Coyoteman]

I do not believe that causing pain just for the sake of causing it to satisfy some base urge is moral. But that's just me.

And a lot of other people, I'm sure. But what is your authority?

Sin lies only in hurting other people unnecessarily. All other "sins" are invented nonsense. (Hurting yourself is not sinful -- just stupid).

Robert A. Heinlein, Time Enough for Love, 1973

[Protagoras]

Robert A. Heinlein, noted science fiction writer and authority on the definition of sin.