In reading his article, I'm once again reminded that there is nothing that is ever described as a "sin" that is something we just wouldn't want to do. (I use the term we in its universal sense. Some of us may not want to commit sin #1 but there are plenty of others who might.
I use as an example, it is not a sin to eat cow dung. Who would ever want to? It seems like someone (or someones) purposely looked around to find out what some group of people wanted to do and said, "Aha, that is a sin!"