Thanks everyone for your replies. I will do the google search and see what I find on believing blood. I am wondering if this is one of those traditions that some people grab onto, like maybe someone heard it in a talk or fireside or whatever and may hold some truth to it, but is not really taught in the scriptures or by prophets other than people drawing conclusions from things they have heard. My impression was that some of the folks in the class did not agree with the comments but not sure enough like myself to correct it. In fact I am still not that sure but and will keep my ears open on this topic.